Podcasts about Magellanic Clouds

Play Episode Listen Later Oct 31, 2023 22:49

Moon Phases: November 5 - the Last Quarter Moon is Sunday, good time for evening skygazing. November 7 - The Moon is at apogee, when it is furthest from the Earth November 13 - New Moon, good time for skygazing the entire night. November 14 - The very thin ‘day old' moon is near Mercury in the west just after sunset. A genuine challenge to catch this. November 20 - First Quarter Moon, great binocular moon gazing time, with Saturn nearby. November 22 - The Moon is at perigee, when it is closest from the Earth. November 25 - Jupiter is only 2 degrees away from the waxing moon. November 27 - Full Moon. Evening Sky: Saturn is nice and high in evening skies and always a joy to observe in the north. On 23 November, Saturn casts its deepest shadow over its rings …. well worth a look, or a photo. Jupiter is bright all night long all the month, and on November 2 - Opposition of Jupiter, Mercury returns to evening skies from mid-month onwards, and easily visible in the west towards the end of the month. Morning Sky: Venus is high and highly visible, and on the 10th, just 4 degrees from the crescent moon. As the month progresses Venus approached the bright star Spica. Stars to watch out for: Scorpius begins to sink below the western horizon. Orion, Canis Major, Carina, Puppis and Vela are beginning to rise in the east, but quite visible by the end of the month, and even easier to see in December. It's a great time to also observe the Magellanic Clouds and the double stars in Tucanae, and the beautiful Tarantula Nebula. December:: Dec 22 - Earth is at Solstice Geminids Meteor Shower - combining with the New Moon, the Geminids will be very nice this year, peaking on Dec 14, but in Australia, best on the morning of Dec 15th, with a show of about 60 meteors/hour expected in Northern Australia, and about 30/hr in the south, depending on the darkness of your sky, from about 1am onwards. Expect to see some very bright ones. Ian's Tangent: Hand-held ‘pocket portable' sundials

Astrophiz180: October SkyGuide

australia stars moon southern sisters wa jupiter partial sagittarius pleiades lmc regulus ferdinand magellan m22 magellanic clouds

Play Episode Listen Later Sep 30, 2023 25:56

Show Notes: Morning Sky Two beautiful bright planets will reward those who get up early in the mornings this month. Jupiter is is rising before midnight but is still best in the morning sky, it is close to the Moon on October 1 and on the 29th. Venus is moving from crescent to half moon phase and climbs higher the morning twilight coming very close to the bright star Regulus by weeks end. Partial penumbral lunar eclipse on October 28 is difficult to observe in central Australia and impossible in eastern states, but is fully visible from WA where the maximum eclipse is at 5:13am. The Moon occultation of the Pleiades (the 7 Sisters, not far from the bright star Aldabaran between about midnight and 01:24 am on 31 October depending on your location. Stars & Constellations Scorpius is setting in the west. Sagittarius is still a feature The globular cluster M22 is always worth catching Southern Cross is also a great feature to view. The LMC is reasonably high in the sky, and there is a move to have the Magellanic Clouds renamed because of Ferdinand Magellan's treatment of indiginous peoples during his voyages. For astrophotographers, the Southern pole star Sigma Octantis is a nice magnitude 5 star challenge for those wanting a perfect circle of star trails. Ian's Tangent The Russian probe crashed on the moon on August 19, which is a reminder that there may be future problems with spacecraft and landers contaminating the moon's water deposits with dust, regolith, hydrazine and other rocket exhaust products.

Champagne Supernova (Remnants)

Spaghettification - Stretching Your Understanding of The Universe

Play Episode Listen Later Aug 29, 2023 43:26

How many stars like to change? How many stars are glowin' strange? Where were you while we exploded in the sky? Quickly shrikin' down into a ball, Faster than a cannonball Where were you while we exploded in the sky? Someday we will find them, Caught within the stardust, In a champagne supernova (Remnants) in the sky. Join us as we discuss all things Supernova Remnants (No singing was recorded in this podcast) with PHD Student Sonja Panjkov and her studies of these mystical marvels hidden within the Magellanic Clouds.Support the show

caught someday supernovas remnants champagne supernova magellanic clouds

The evolution of The Milky Way

The Science Show - Separate stories podcast

Play Episode Listen Later Jan 14, 2023 8:06

Naomi McClure-Griffiths is studying the process of galaxies consuming their neighbours and she says this will happen as the Milky Way and the galaxies of the Magellanic Clouds merge.

evolution milky way galaxies magellanic clouds

The evolution of The Milky Way

The Science Show - Separate stories podcast

Play Episode Listen Later Jan 14, 2023 8:06

Naomi McClure-Griffiths is studying the process of galaxies consuming their neighbours and she says this will happen as the Milky Way and the galaxies of the Magellanic Clouds merge.

evolution milky way galaxies magellanic clouds

Human Life

Idaho Speaks

Play Episode Listen Later Jan 9, 2023 10:15

Would you like to share your thoughts with Ralph? Please email your comments to hello@idahospeaks.com or post your comments on @IdahoSpeaks on Twitter.Idaho Speaks is a listener supported production. Please visit idahospeaks.com/support to learn more.Do you have something so say? Interested in learning more about publishing on the Idaho Speaks Network? Our nation was built on ideas and your idea could be the next political advancement for Idaho. Call Ed at (208) 209-7170 or email hello@idahospeaks.com to start the conversation.Transcript:HUMAN LIFE"Keep Right with Ralph K. Ginorio"Human life is special because we are the only as yet known self-aware beings in the universe. While on this world arguments can be made that certain whales, dolphins, chimpanzees, bonobos, elephants, octopi, ravens, hive insects, and even now a few computers possess some form of non-human intelligence, only we Homo Sapiens Sapiens are known to be fully sentient.By the principles that governs economics, scarcity confers value. One of gold's qualities, along with beauty, that makes it precious is that it is encountered infrequently. Uncommon items and services always command a great price in proportion to their rarity.In all the known universe, we have not encountered signs of life, let alone intelligent life. Could it be possible that, in all of creation, only we are awake to our own existence?!Perhaps, though I think this unlikely. The sheer scope of our own galactic spiral arm, let alone that of our Milky Way galaxy, its orbiting Magellanic Clouds, the rest of our local galactic cluster, and the near-infinite number of galactic superclusters makes this terribly unlikely.So, while I personally believe that we are not alone, I acknowledge that in this moment our civilization has no proof of this. As far as we can prove, our species may be the only thinking, remembering, and planning race of beings.That makes us precious, because we may be unique.Even if we eventually encounter nonhuman minds, they are likely to be so different from us that our uniqueness will persist. Set against alien mentalities, the particularities of our distinct human perspectives will still likely be unparalleled.We have actually already encountered this phenomena. Within the past six centuries, as our European and Judeo-Christian Western Civilization encountered the locally evolved cultures and civilizations that existed beyond Europe, unbridgeable gulfs of assumption sundered the Earth's scattered iterations of human society.Consider how fundamentally different were the habits, manners, beliefs, and institutions of Muromachi Japan from those of the Iroquois Confederacy; how the Khmer differed from the Incas. Even within regions, mutually exclusive cultural predispositions proliferated, as with the Mughals and the Ming, the Mongols and the Arabs, the Tahitians and the Aborigines.We human beings ARE alien to one another. It is our un-reflected-upon cultural values that determine the meaning of everything we encounter. As such, there is a value in preserving the stories, languages, and folkways of cultures that are in the process of being erased by contact with the wider world. Consider how thoroughly human cultures might melt in the presence of an interstellar civilization thousands of years more advanced than the Earth's apex culture.Unique human cultures and subcultures should be preserved because of their unique understandings of life, the universe, and everything. Without their insights, our shared understanding would be incomplete.However, we are increasingly beset by the sheer numbers of our fellow man. Human population has exploded since World War II, when the United States led the West in openly sharing modern medical and agricultural technologies with the undeveloped world. American and allied Universities have disseminated advanced knowledge as our government and businesses have shared sophisticated products.One result is that societies who never developed industrial and post-industrial resources now have them. These modern blessings are killing the Third World.For example, it took Europe centuries of slow growth, plus the first century of industrial development, to alter the size of the average family. The quantity of children was reduced as the chance for survival for each child increased. In the modern epoch, the West stabilized at a rate of slow population growth in accord with our society's growing wealth and expectations.On the other hand, many cultures around the world equate male value with the number of boys that a man fathers. More boys equates to higher status and to greater respect. Over the past eighty years, there has been no significant reduction in these pre-industrial birth rates to conform to changed circumstances.We are seeing the world's human population doubling itself in increasingly short intervals. Unchecked, this will finally outrun our technological advances in food production and medicine. If nothing changes, we face the apocalyptic overpopulation crisis predicted by Thomas Malthus centuries ago.As uncommon as humanity is in our universe, individual human beings are uncomfortably common. Just as rarity confers value, overabundance undermines it.Today, our would-be social engineers see this population crisis as the greatest threat facing our world. Their climate crisis language all adds up to their conviction that the uncontrolled proliferation of human life must be stopped.This is why Western elites like Claus Schwab's World Economic Forum advocate policies that must inevitably destroy human rights and freedom. If the West devolves into a new technocratic feudalism, the overpopulating human herd could be culled.Without liberty, enterprise withers. Without recognized inalienable God-given rights, the individual becomes subsumed into the mass. By restricting our food supply, our access to medicine, and the quality of our education, everyday people in the West will be reduced to the status of Serfs.A distinct West will dissolve into a new global dependency, where technocrats will rule over us without restriction. They will call all of this necessary for the sustainability of humanity; for the good of the planet.This all derives from pride, intensified to the point of hubris. These elites have sloughed off all humility, all reference to the lodestone of the transcendent values of the Judeo-Christian West.As they deny the existence of God, they can play at being gods. Without hope of heaven or fear of hell, there are no limits to the extent they will go in service to their ambitions. Without genuine connections by love and family to the rest of humanity, these elites increasingly see themselves as a natural aristocracy; as a people apart with a manifest destiny to rule.This disconnection from our shared humanity is coupled by their lack of humility before the imponderable mysteries of creation. Like Communists before them, today's elites are dedicated to the use of the structures of authority to remold human life. They have a solution to the problems of humanity. Their solution is control; control over speech, the economy, and over thought itself.What they lack is faith: faith that there is more in heaven and Earth than are dreamt of in their philosophies; faith in a God who is both loving and involved in history. They lack faith in the virtues of common human beings; faith in the unpredictable possibilities of unfettered human imagination.In their arrogant fervor to save the planet, they have stripped themselves of any real capacity to believe in mysteries of existence that are beyond their powers to identify, quantify, and control. They truly have come to see themselves as being apart from the rest of us, above the rest of us, and responsible for the rest of us.In separating themselves from other flesh-and-blood human beings beyond their circle of peers and servants, these wealthy, knowledgeable, and influential people have lost their essential humanity.We, who are beyond these elites, must not! We must each endeavor to revive the special status of human life. We must recall our rarity in the universe even as we contend with the cultural challenges of overpopulation.This should start with the most powerless among us. No unborn child should be seen as a mere extension of the mother's body. When we abandoned our insistence that the unborn were in fact human beings, we sowed the seeds of what could be our own destruction.Every human life matters! When the rights and dignity of anyone is diminished, we are all threatened. No one must be sacrificed in a latter-day blood-rite to serve the ambitions of another.We must face today's problems with faith in God, hope beyond reason, and trust in the possibilities of the unshackled creativity of free men and women. We must reject fear. We must not despair! We must each be prisoners of hope!***In Maine and then Idaho, Ralph K. Ginorio has taught the history of Western Civilization to High School students for nearly a quarter century. He is an “out-of-the-closet” Conservative educator with experience in Special Education, Public Schools, and Charter Schools, Grades 6-12. He has lived in Coeur d'Alene since 2014.

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33

loss revealed mass rates functions evolutionary luminosity arxiv eddington rsg averaged m31 magellanic clouds

Play Episode Listen Later Nov 30, 2022 1:01

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33 by Philip Massey et al. on Wednesday 30 November Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer temperatures before undergoing core collapse. The current Geneva evolutionary models mimic episodic mass loss by enhancing the quiescent prescription rates whenever the star's outer layers exceed the Eddington luminosity by a large factor. This results in a 20 solar-mass model undergoing significantly more mass loss during the RSG phase than it would have otherwise, but has little effect on models of lower masses. We can test the validity of this approach observationally by measuring the proportion of high-luminosity RSGs to that predicted by the models. To do this, we use our recent luminosity-limited census of RSGs in M31 and M33, making modest improvements to membership, and adopting extinctions based on the recent panchromatic M31 and M33 Hubble surveys. We then compare the proportions of the highest luminosity RSGs found to that predicted by published Geneva models, as well as to a special set of models computed without the enhanced rates. We find good agreement with the models which include the supra-Eddington enhanced mass loss. The models with lower mass-loss rates predict a larger fraction of high-luminosity RSGs than observed, and thus can be ruled out. We also use these improved data to confirm that the upper luminosity limit of RSGs is log L/Lo~5.4, regardless of metallicity, using our improved data on M31 and M33 plus previous results on the Magellanic Clouds. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14147v2

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33

loss revealed mass rates functions evolutionary luminosity arxiv eddington rsg averaged m31 magellanic clouds

Play Episode Listen Later Nov 29, 2022 1:06

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33 by Philip Massey et al. on Tuesday 29 November Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer temperatures before undergoing core collapse. The current Geneva evolutionary models mimic episodic mass loss by enhancing the quiescent prescription rates whenever the star's outer layers exceed the Eddington luminosity by a large factor. This results in a 20 solar-mass model undergoing significantly more mass loss during the RSG phase than it would have otherwise, but has little effect on models of lower masses. We can test the validity of this approach observationally by measuring the proportion of high-luminosity RSGs to that predicted by the models. To do this, we use our recent luminosity-limited census of RSGs in M31 and M33, making modest improvements to membership, and adopting extinctions based on the recent panchromatic M31 and M33 Hubble surveys. We then compare the proportions of the highest luminosity RSGs found to that predicted by published Geneva models, as well as to a special set of models computed without the enhanced rates. We find good agreement with the models which include the supra-Eddington enhanced mass loss. The models with lower mass-loss rates predict a larger fraction of high-luminosity RSGs than observed, and thus can be ruled out. We also use these improved data to confirm that the upper luminosity limit of RSGs is log L/Lo~5.4, regardless of metallicity, using our improved data on M31 and M33 plus previous results on the Magellanic Clouds. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14147v1

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33

loss revealed mass rates functions evolutionary luminosity arxiv eddington rsg averaged m31 magellanic clouds

Play Episode Listen Later Nov 29, 2022 1:06

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33 by Philip Massey et al. on Tuesday 29 November Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer temperatures before undergoing core collapse. The current Geneva evolutionary models mimic episodic mass loss by enhancing the quiescent prescription rates whenever the star's outer layers exceed the Eddington luminosity by a large factor. This results in a 20 solar-mass model undergoing significantly more mass loss during the RSG phase than it would have otherwise, but has little effect on models of lower masses. We can test the validity of this approach observationally by measuring the proportion of high-luminosity RSGs to that predicted by the models. To do this, we use our recent luminosity-limited census of RSGs in M31 and M33, making modest improvements to membership, and adopting extinctions based on the recent panchromatic M31 and M33 Hubble surveys. We then compare the proportions of the highest luminosity RSGs found to that predicted by published Geneva models, as well as to a special set of models computed without the enhanced rates. We find good agreement with the models which include the supra-Eddington enhanced mass loss. The models with lower mass-loss rates predict a larger fraction of high-luminosity RSGs than observed, and thus can be ruled out. We also use these improved data to confirm that the upper luminosity limit of RSGs is log L/Lo~5.4, regardless of metallicity, using our improved data on M31 and M33 plus previous results on the Magellanic Clouds. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14147v2

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33

loss revealed mass rates functions evolutionary luminosity arxiv eddington rsg averaged m31 magellanic clouds

Play Episode Listen Later Nov 28, 2022 0:56

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33 by Philip Massey et al. on Monday 28 November Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer temperatures before undergoing core collapse. The current Geneva evolutionary models mimic episodic mass loss by enhancing the quiescent prescription rates whenever the star's outer layers exceed the Eddington luminosity by a large factor. This results in a 20 solar-mass model undergoing significantly more mass loss during the RSG phase than it would have otherwise, but has little effect on models of lower masses. We can test the validity of this approach observationally by measuring the proportion of high-luminosity RSGs to that predicted by the models. To do this, we use our recent luminosity-limited census of RSGs in M31 and M33, making modest improvements to membership, and adopting extinctions based on the recent panchromatic M31 and M33 Hubble surveys. We then compare the proportions of the highest luminosity RSGs found to that predicted by published Geneva models, as well as to a special set of models computed without the enhanced rates. We find good agreement with the models which include the supra-Eddington enhanced mass loss. The models with lower mass-loss rates predict a larger fraction of high-luminosity RSGs than observed, and thus can be ruled out. We also use these improved data to confirm that the upper luminosity limit of RSGs is log L/Lo~5.4, regardless of metallicity, using our improved data on M31 and M33 plus previous results on the Magellanic Clouds. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14147v1

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33

loss revealed mass rates functions evolutionary luminosity arxiv eddington rsg averaged m31 magellanic clouds

Play Episode Listen Later Nov 28, 2022 0:57

The Time-Averaged Mass-Loss Rates of Red Supergiants As Revealed by their Luminosity Functions in M31 and M33 by Philip Massey et al. on Monday 28 November Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer temperatures before undergoing core collapse. The current Geneva evolutionary models mimic episodic mass loss by enhancing the quiescent prescription rates whenever the star's outer layers exceed the Eddington luminosity by a large factor. This results in a 20 solar-mass model undergoing significantly more mass loss during the RSG phase than it would have otherwise, but has little effect on models of lower masses. We can test the validity of this approach observationally by measuring the proportion of high-luminosity RSGs to that predicted by the models. To do this, we use our recent luminosity-limited census of RSGs in M31 and M33, making modest improvements to membership, and adopting extinctions based on the recent panchromatic M31 and M33 Hubble surveys. We then compare the proportions of the highest luminosity RSGs found to that predicted by published Geneva models, as well as to a special set of models computed without the enhanced rates. We find good agreement with the models which include the supra-Eddington enhanced mass loss. The models with lower mass-loss rates predict a larger fraction of high-luminosity RSGs than observed, and thus can be ruled out. We also use these improved data to confirm that the upper luminosity limit of RSGs is log L/Lo~5.4, regardless of metallicity, using our improved data on M31 and M33 plus previous results on the Magellanic Clouds. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14147v1

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates

Play Episode Listen Later Nov 24, 2022 0:56

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates by Anna J. G. O'Grady et al. on Thursday 24 November In previous work we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne-.Zytkow Objects (T.ZOs, red supergiants with a neutron star cores) or super-AGB stars (the most massive stars that will not undergo core collapse). This population includes HV,2112, a peculiar star previously considered in other works to be either a T.ZO or high-mass AGB star. Here we continue this investigation, using the kinematic and radio environments and local star formation history of these stars to place constraints on the age of the progenitor systems and the presence of past supernovae. These stars are not associated with regions of recent star formation, and we find no evidence of past supernovae at their locations. Finally, we also assess the presence of heavy elements and lithium in their spectra compared to red supergiants. We find strong absorption in Li and s-process elements compared to RSGs in most of the sample, consistent with super-AGB nucleosynthesis, while HV,2112 shows additional strong lines associated with T.ZO nucleosynthesis. Coupled with our previous mass estimates, the results are consistent with the stars being massive (~4-6.5M$_{odot}$) or super-AGB (~6.5-12M$_{odot}$) stars in the thermally pulsing phase, providing crucial observations of the transition between low- and high-mass stellar populations. HV,2112 is more ambiguous; it could either be a maximally massive sAGB star, or a T.ZO if the minimum mass for stability extends down to

stars candidates li zo object 5m variable thorne coupled luminous 12m hv agb arxiv environmental analysis zos magellanic clouds

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates

Play Episode Listen Later Nov 23, 2022 1:12

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates by Anna J. G. O'Grady et al. on Wednesday 23 November In previous work we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne-.Zytkow Objects (T.ZOs, red supergiants with a neutron star cores) or super-AGB stars (the most massive stars that will not undergo core collapse). This population includes HV,2112, a peculiar star previously considered in other works to be either a T.ZO or high-mass AGB star. Here we continue this investigation, using the kinematic and radio environments and local star formation history of these stars to place constraints on the age of the progenitor systems and the presence of past supernovae. These stars are not associated with regions of recent star formation, and we find no evidence of past supernovae at their locations. Finally, we also assess the presence of heavy elements and lithium in their spectra compared to red supergiants. We find strong absorption in Li and s-process elements compared to RSGs in most of the sample, consistent with super-AGB nucleosynthesis, while HV,2112 shows additional strong lines associated with T.ZO nucleosynthesis. Coupled with our previous mass estimates, the results are consistent with the stars being massive (~4-6.5M$_{odot}$) or super-AGB (~6.5-12M$_{odot}$) stars in the thermally pulsing phase, providing crucial observations of the transition between low- and high-mass stellar populations. HV,2112 is more ambiguous; it could either be a maximally massive sAGB star, or a T.ZO if the minimum mass for stability extends down to

stars candidates li zo object 5m variable thorne coupled luminous 12m hv agb arxiv environmental analysis zos magellanic clouds

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates

Play Episode Listen Later Nov 23, 2022 1:12

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates by Anna J. G. O'Grady et al. on Wednesday 23 November In previous work we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne-.Zytkow Objects (T.ZOs, red supergiants with a neutron star cores) or super-AGB stars (the most massive stars that will not undergo core collapse). This population includes HV,2112, a peculiar star previously considered in other works to be either a T.ZO or high-mass AGB star. Here we continue this investigation, using the kinematic and radio environments and local star formation history of these stars to place constraints on the age of the progenitor systems and the presence of past supernovae. These stars are not associated with regions of recent star formation, and we find no evidence of past supernovae at their locations. Finally, we also assess the presence of heavy elements and lithium in their spectra compared to red supergiants. We find strong absorption in Li and s-process elements compared to RSGs in most of the sample, consistent with super-AGB nucleosynthesis, while HV,2112 shows additional strong lines associated with T.ZO nucleosynthesis. Coupled with our previous mass estimates, the results are consistent with the stars being massive (~4-6.5M$_{odot}$) or super-AGB (~6.5-12M$_{odot}$) stars in the thermally pulsing phase, providing crucial observations of the transition between low- and high-mass stellar populations. HV,2112 is more ambiguous; it could either be a maximally massive sAGB star, or a T.ZO if the minimum mass for stability extends down to

stars candidates li zo object 5m variable thorne coupled luminous 12m hv agb arxiv environmental analysis zos magellanic clouds

Rotation measure structure functions with higher-order stencils as a probe of small-scale magnetic fluctuations and its application to the Small and Large Magellanic Clouds

large structure measure application probe rotation magnetic functions rm ism fluctuations small scale smc lmc arxiv gaussian higher order stencils magellanic clouds

Play Episode Listen Later Oct 16, 2022 1:02

Rotation measure structure functions with higher-order stencils as a probe of small-scale magnetic fluctuations and its application to the Small and Large Magellanic Clouds by Amit Seta et al. on Sunday 16 October Magnetic fields and turbulence are important components of the interstellar medium (ISM) of star-forming galaxies. It is challenging to measure the properties of the small-scale ISM magnetic fields (magnetic fields at scales smaller than the turbulence driving scale). Using numerical simulations, we demonstrate how the second-order rotation measure (RM, which depends on thermal electron density, $n_{rm e}$, and magnetic field, $b$) structure function can probe the properties of small-scale $b$. We then apply our results to observations of the Small and Large Magellanic Clouds (SMC and LMC). First, using Gaussian random $b$, we show that the characteristic scale where the RM structure function flattens is approximately equal to the correlation length of $b$. We also show that computing the RM structure function with a higher-order stencil (more than the commonly-used two-point stencil) is necessary to accurately estimate the slope of the structure function. Then, using Gaussian random $b$ and lognormal $n_{rm e}$ with known power spectra, we derive an empirical relationship between the slope of the power spectrum of $b$, $n_{rm e}$, and RM. We apply these results to the SMC and LMC and estimate the following properties of small-scale $b$: correlation length ($160~pm 21~{rm pc}$ for the SMC and $87~pm~17~{rm pc}$ for the LMC), strength ($14~pm 2~mu{rm G}$ for the SMC and $15~pm 3~mu{rm G}$ for the LMC), and slope of the magnetic power spectrum ($-1.3~pm~0.4$ for the SMC and $-1.6~pm~0.1$ for the LMC). We also find that $n_{rm e}$ is practically constant over the estimated $b$ correlation scales. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.13798v2

The homogeneity of chemical abundances in H II regions of the Magellanic Clouds

Play Episode Listen Later Oct 16, 2022 0:58

The homogeneity of chemical abundances in H II regions of the Magellanic Clouds by G. Domínguez-Guzmán et al. on Sunday 16 October We use very deep spectra obtained with the Ultraviolet-Visual Echelle Spectrograph at the Very Large Telescope to derive physical conditions and chemical abundances of four H II regions of the Large Magellanic Cloud (LMC) and four H II regions of the Small Magellanic Cloud (SMC). The observations cover the spectral range 3100-10400 A with a spectral resolution of $Deltalambdagelambda/11600$, and we measure 95-225 emission lines in each object. We derive ionic and total abundances of O, N, S, Ne, Ar, Cl, and Fe using collisionally excited lines. We find average values of $12+log(mbox{O/H})=8.37$ in the LMC and $8.01$ in the SMC, with standard deviations of $sigma=0.03$ and 0.02~dex, respectively. The S/O, Ne/O, Ar/O, and Cl/O abundance ratios are very similar in both clouds, with $sigma=0.02$-0.03~dex, which indicates that the chemical elements are well mixed in the interstellar medium of each galaxy. The LMC is enhanced in N/O by $sim0.20$~dex with respect to the SMC, and the dispersions in N/O, $sigma=0.05$~dex in each cloud, are larger than those found for the other elements. The derived standard deviations would be much larger for all the abundance ratios, up to 0.20~dex for N/O, if previous spectra of these objects were used to perform the analysis. Finally, we find a wide range of iron depletions in both clouds, with more than 90 per cent of the iron atoms deposited onto dust grains in most objects. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.07460v1

delta dom chemical regions guzm s o aro smc lmc arxiv homogeneity very large telescope magellanic clouds

Properties of luminous red supergiant stars in the Magellanic Clouds

Play Episode Listen Later Sep 25, 2022 1:05

Properties of luminous red supergiant stars in the Magellanic Clouds by S. de Wit et al. on Sunday 25 September There is evidence that some red supergiants (RSGs) experience short lived phases of extreme mass loss, producing copious amounts of dust. These episodic outburst phases help to strip the hydrogen envelope of evolved massive stars, drastically affecting their evolution. However, to date, the observational data of episodic mass loss is limited. This paper aims to derive surface properties of a spectroscopic sample of fourteen dusty sources in the Magellanic Clouds using the Baade telescope. These properties may be used for future spectral energy distribution fitting studies to measure the mass loss rates from present circumstellar dust expelled from the star through outbursts. We apply MARCS models to obtain the effective temperature ($T_{rm eff}$) and extinction ($A_V$) from the optical TiO bands. We use a $chi^2$ routine to determine the best fit model to the obtained spectra. We compute the $T_{rm eff}$ using empirical photometric relations and compare this to our modelled $T_{rm eff}$. We have identified a new yellow supergiant and spectroscopically confirmed eight new RSGs and one bright giant in the Magellanic Clouds. Additionally, we observed a supergiant B[e] star and found that the spectral type has changed compared to previous classifications, confirming that the spectral type is variable over decades. For the RSGs, we obtained the surface and global properties, as well as the extinction $A_V$. Our method has picked up eight new, luminous RSGs. Despite selecting dusty RSGs, we find values for $A_V$ that are not as high as expected given the circumstellar extinction of these evolved stars. The most remarkable object from the sample, LMC3, is an extremely massive and luminous evolved massive star and may be grouped amongst the largest and most luminous RSGs known in the Large Magellanic Cloud (log(L$_*$/L$_{odot})sim$5.5 and $R = 1400 , textrm R_{odot}$). arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.11239v1

stars properties wit luminous tio supergiant arxiv large magellanic cloud baade magellanic clouds

The effects of surface fossil magnetic fields on massive star evolution: IV Grids of models at Solar, LMC, and SMC metallicities

Play Episode Listen Later Sep 14, 2022 1:02

The effects of surface fossil magnetic fields on massive star evolution: IV Grids of models at Solar, LMC, and SMC metallicities by Z. Keszthelyi et al. on Wednesday 14 September Magnetic fields can drastically change predictions of evolutionary models of massive stars via mass-loss quenching, magnetic braking, and efficient angular momentum transport, which we aim to quantify in this work. We use the MESA software instrument to compute an extensive main-sequence grid of stellar structure and evolution models, as well as isochrones, accounting for the effects attributed to a surface fossil magnetic field. The grid is densely populated in initial mass (3-60 M$_odot$), surface equatorial magnetic field strength (0-50 kG), and metallicity (representative of the Solar neighbourhood and the Magellanic Clouds). We use two magnetic braking and two chemical mixing schemes and compare the model predictions for slowly-rotating, nitrogen-enriched ("Group 2") stars with observations in the Large Magellanic Cloud. We quantify a range of initial field strengths that allow for producing Group 2 stars and find that typical values (up to a few kG) lead to solutions. Between the subgrids, we find notable departures in surface abundances and evolutionary paths. In our magnetic models, chemical mixing is always less efficient compared to non-magnetic models due to the rapid spin-down. We identify that quasi-chemically homogeneous main sequence evolution by efficient mixing could be prevented by fossil magnetic fields. We recommend comparing this grid of evolutionary models with spectropolarimetric and spectroscopic observations with the goals of i) revisiting the derived stellar parameters of known magnetic stars, and ii) observationally constraining the uncertain magnetic braking and chemical mixing schemes. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.06350v1

evolution massive effects solar models surface fossil kg magnetic fields grids smc lmc arxiv magellanic clouds

Strong lithium lines in red supergiants at different metallicities

The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009

Play Episode Listen Later Sep 7, 2022 0:35

Strong lithium lines in red supergiants at different metallicities by Ignacio Negueruela et al. on Wednesday 07 September Current models of stellar evolution predict that stars more massive than $sim6:$M$_{odot}$ should have completely depleted all lithium (Li) in their atmospheres by the time when they reach the He core burning phase. Against this, a non-negligible number of red giants with masses $>6:$M$_{odot}$ presenting strong Li lines have recently been reported. Motivated by this finding, we have carried out a spectroscopic survey of red supergiants (RSGs) in the Perseus Arm and a selection of young open clusters in the Magellanic Clouds to assess the presence of the Li I $lambda$6708 doublet line. Based on a sample of >70 objects, close to one third of RSGs in the Perseus Arm display noticeable Li lines, with perhaps a trend towards a lower fraction among more luminous stars. The samples in the Magellanic Clouds are not as large, but hint at a metallicity dependence. Twenty one RSGs in 5 LMC clusters show a very high fraction of Li detection, around 40%. Conversely, 17 RSGs in 5 SMC clusters give only one secure detection. The interpretation of these observational results is not straightforward, but a mechanism for Li production seems most likely. Further characterisation work is ongoing, while theoretical studies into this matter are urgently needed. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.03010v1

lines twenty motivated li conversely lithium smc lmc arxiv magellanic clouds

UNAWE Space Scoop - Cosmic Duet

Play Episode Listen Later Jun 23, 2022 5:56 Very Popular

https://www.spacescoop.org/en/scoops/2208/a-cosmic-duet/ Astronomers have just captured a new image of a beautiful sort of “dance” between two galaxies: the spiral NGC 1512, it's the pretty, large, barred spiral in the picture, and its small neighbor NGC 1510. You'll find a link to the picture here: https://noirlab.edu/public/news/noirlab2210/ They're located in the direction of constellation Horologium, or The Clock, some 60 million light-years from us, in Earth's southern sky. Such galaxy mergers are common. Our own Milky Way is currently merging with several dwarf galaxies, most prominently the large and small Magellanic Clouds. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

earth space clock cosmic scoop astronomy milky way duet astronomers ngc planetary science institute astronomy cast magellanic clouds astronomy podcast cosmoquest

All About Dwarf Galaxies: A Conversation with Astronomer Charlotte Christensen

New Books Network

Play Episode Listen Later Jun 15, 2022 30:41

Today I talked to astronomer Charlotte Christensen of Grinnell College. She studies (among other things) dwarf galaxies. Dwarf galaxies, galaxies with masses about 10% that of the Milky Way or smaller, such as the Magellanic Clouds, are perfect laboratories for studying galaxy evolution. The small gravitational potentials of dwarf galaxies make them uniquely sensitive environments for understanding the physics of galaxy formation, including the processes that drive gas accretion, gas loss, and star formation. Dwarf satellites of the Milky Way or similar nearby galaxies may help constrain these processes, but only if the effect of the large halo environment the dwarf galaxies exist in can be well understood. Marshall Poe is the founder and editor of the New Books Network. He can be reached at marshallpoe@newbooksnetwork.com. Learn more about your ad choices. Visit megaphone.fm/adchoices Support our show by becoming a premium member! https://newbooksnetwork.supportingcast.fm/new-books-network

conversations christensen milky way dwarf astronomers galaxies grinnell college new books network marshall poe magellanic clouds

All About Dwarf Galaxies: A Conversation with Astronomer Charlotte Christensen

New Books in Science

Play Episode Listen Later Jun 15, 2022 30:41

Today I talked to astronomer Charlotte Christensen of Grinnell College. She studies (among other things) dwarf galaxies. Dwarf galaxies, galaxies with masses about 10% that of the Milky Way or smaller, such as the Magellanic Clouds, are perfect laboratories for studying galaxy evolution. The small gravitational potentials of dwarf galaxies make them uniquely sensitive environments for understanding the physics of galaxy formation, including the processes that drive gas accretion, gas loss, and star formation. Dwarf satellites of the Milky Way or similar nearby galaxies may help constrain these processes, but only if the effect of the large halo environment the dwarf galaxies exist in can be well understood. Marshall Poe is the founder and editor of the New Books Network. He can be reached at marshallpoe@newbooksnetwork.com. Learn more about your ad choices. Visit megaphone.fm/adchoices Support our show by becoming a premium member! https://newbooksnetwork.supportingcast.fm/science

conversations christensen milky way dwarf astronomers galaxies grinnell college new books network marshall poe magellanic clouds

All About Dwarf Galaxies: A Conversation with Astronomer Charlotte Christensen

New Books in Physics and Chemistry

Play Episode Listen Later Jun 15, 2022 30:41

Today I talked to astronomer Charlotte Christensen of Grinnell College. She studies (among other things) dwarf galaxies. Dwarf galaxies, galaxies with masses about 10% that of the Milky Way or smaller, such as the Magellanic Clouds, are perfect laboratories for studying galaxy evolution. The small gravitational potentials of dwarf galaxies make them uniquely sensitive environments for understanding the physics of galaxy formation, including the processes that drive gas accretion, gas loss, and star formation. Dwarf satellites of the Milky Way or similar nearby galaxies may help constrain these processes, but only if the effect of the large halo environment the dwarf galaxies exist in can be well understood. Marshall Poe is the founder and editor of the New Books Network. He can be reached at marshallpoe@newbooksnetwork.com. Learn more about your ad choices. Visit megaphone.fm/adchoices

conversations christensen milky way dwarf astronomers galaxies grinnell college new books network marshall poe magellanic clouds

All About Dwarf Galaxies: A Conversation with Astronomer Charlotte Christensen

Grinnell College: Authors and Artists

Play Episode Listen Later Jun 15, 2022 30:41

Today I talked to astronomer Charlotte Christensen of Grinnell College. She studies (among other things) dwarf galaxies. Dwarf galaxies, galaxies with masses about 10% that of the Milky Way or smaller, such as the Magellanic Clouds, are perfect laboratories for studying galaxy evolution. The small gravitational potentials of dwarf galaxies make them uniquely sensitive environments for understanding the physics of galaxy formation, including the processes that drive gas accretion, gas loss, and star formation. Dwarf satellites of the Milky Way or similar nearby galaxies may help constrain these processes, but only if the effect of the large halo environment the dwarf galaxies exist in can be well understood. Marshall Poe is the founder and editor of the New Books Network. He can be reached at marshallpoe@newbooksnetwork.com.

conversations christensen milky way dwarf astronomers galaxies grinnell college new books network marshall poe magellanic clouds

#025: Dr. Annapurni Subramaniam on Reaching for the Stars with Grace and Humility

Contraminds - Decoding People, Minds, Strategy and Culture

Play Episode Listen Later Mar 21, 2022 67:05

Dr. Annapurni Subramaniam serves as the Director of the Indian Institute of Astrophysics, Bangalore. Her research work focuses on Star Clusters, Stellar Evolution and Population in Galaxies and Magellanic Clouds. In this episode, Dr. Annapurni speaks to us about her childhood fascination with the night sky, her thoughts on a long-term vision for Scientific Research in India, and balancing leadership and contributor roles in projects with grace and humility.

director stars humility reaching population bangalore astrophysics galaxies scientific research indian institute stellar evolution star clusters magellanic clouds

Astrophiz137-November SkyGuide

stars new zealand pop award winning shorts wairarapa magellanic clouds

Play Episode Listen Later Oct 31, 2021 35:18

A monthly treat for naked-eye celestial observers, telescopers, and astrophotographers. Three nice bright planets again this month. Once again in evening skies, magnificent Venus, Saturn and Jupiter Over in the West, Venus is spectacular. For Norther hemisphere observers, the Andromeda galaxy is looking magnificent under dark skies, while in the Southern Hemisphere the Magellanic Clouds are simply beautiful. In Ian's Tangent, he continues his comet theme to tell us about spectacular comets and in particular the size of comets and how some comets with a small nucleus can still be magnificent in our skies, depending on their proximity to the sun, how often the comet visits the inner solar system and its proximity to the earth's orbit. Ian goes on to discuss various definitions and the challenge of whether an object in our skies could be a comet, asteroid or minor planet

west saturn tangent andromeda southern hemisphere magellanic clouds in ian

Talking about Magellanic Clouds - Under The Stars #Shorts

Under The Stars

Play Episode Listen Later Sep 12, 2021 4:45

This week Becky from Under The Stars talks about the Magellanic Clouds. UTS Shorts are a series of quick listens full of information about things you can see in the night sky from your place. Pop on a warm jacket, head outside under the stars and play the podcast. Under The Stars is an Award Winning nomadic Stargazing Service in the Wairarapa, New Zealand. Find out more at www.underthestars.co.nz

Talking about Magellanic Clouds - Under The Stars #Shorts

Under The Stars

Play Episode Listen Later Sep 12, 2021 4:45

This week Becky from Under The Stars talks about the Magellanic Clouds. UTS Shorts are a series of quick listens full of information about things you can see in the night sky from your place. Pop on a warm jacket, head outside under the stars and play the podcast. Under The Stars is an Award Winning nomadic Stargazing Service in the Wairarapa, New Zealand. Find out more at www.underthestars.co.nz

stars new zealand pop award winning shorts wairarapa magellanic clouds

Travelers and Explorers, Part 5: Ferdinand Magellan (1480-1521) and His Terrifying Voyage Across an Endless Ocean

History Unplugged Podcast

Play Episode Listen Later Jun 29, 2021 41:42

Ferdinand Magellan was ready to conquer the natives with nothing but a few loyal soldiers. He had already discovered vast new swaths of the globe and crossed the world's largest ocean. Capturing this small island in the Philippines seemed a trifle by comparison. Magellan's confidence was supreme. He faced down the islanders of Mactan with only 60 crew members, turning down the help of 1,000 natives in battle, offered by an allied Filipino leader, in order to personally avenge an insult.It proved to be a rash call. The captain, the first to cross the Pacific and lead his crew on a voyage of starvation and death, was killed by believing that he would forever defeat the odds.Magellan's reputation has recovered over the centuries. His bravery, innovation, andperseverance are now considered unparalleled during his time. He discovered and sailedthrough one of the most dangerous waterways in the world, named the Pacific Ocean, and circumnavigated the globe, albeit posthumously. His pioneering spirit in an age of discovery lives on in geographic names such as the Strait of Magellan. Despite his poor reputation, he inspired Spanish and Portuguese sailors to open eastern Asia to trade. Magellan accelerated the Age of Discovery and laid the groundwork for European colonialism, which in turn created twenty-first-century globalization.His legacy carries influence today. New discoveries are associated with this iconic explorer. His crew first spotted the Magellanic Clouds, a cluster of galaxies visible in the night sky. NASA launched the Magellan spacecraft in 1989 to map the surface of Venus and measure the planetary gravitational field. In an unintentional homage to the Portuguese explorer, the oneton probe took the long way to reach Venus, looping around the Sun one and a half times before arriving at the gaseous planet. Craters and landmarks on the moon and Mars bear his name – a testament to a man who fearlessly forged paths into the unknown.

Warning from the Ancient Megaliths. The Role of the Sun. What to Expect from the Climate

ALLATRA English

Play Episode Listen Later Jan 25, 2021 25:43

What do we know about the Sun? Why did the ancients watch our sun so closely? Paleo observatories dating over 5,000 thousand years old, including Angkor Wat in Cambodia, Abu Simbel in Egypt, Easter island structures, Machu Picchu, Stonehenge in the United Kingdom, Tiwanaku, Newgrange in Ireland, and Arkaim in Russia - what do they have in common? Mayan Indians and their methods of observing the heavenly bodies. Knowledge about the cyclical nature of cosmic processes. The records of important astronomical events in space. Ancient observatories, as gigantic devices. Precession drift with the cycle of 25,920 years, what is behind it? Why did the ancients pay special attention to the transition from the Age of Pisces to the Age of Aquarius? Giorgio de Santillana, Professor of history, on the position of the Sun among the constellations on the day of the vernal equinox. "Inconvenient facts" as the evidence of the knowledge of ancient people. What is happening to the Sun now? The fourth period of low solar activity. What do scientists say about it? Nikolay Vladimirovich Lovelius and Alexey Yuryevich Reteyum about the influence of solar activity on the movement of the planets. The response of Lake Victoria to variable impulses from the Solar system. Doctor of Technical sciences Filler Zalman on the rate of change in solar activity as a trigger for earthquakes. Processes in the photosphere and deep layers of our Sun and their dependence on the location of the planets in the solar system. Yuri Vladimirovich Barkin, Ph.D. in Physics and Mathematics, and his research on the key role of the planet's core in the formation and change of the planet's climate. How do the Sun and other planets regulate displacements and oscillations of the planet's core? Unity and interrelation of all bodies of the Solar system. Gravitational oscillation of the core, what kind of process is it? Cyclical nature of geological, geophysical and geodynamic processes and their synchronicity. Inhomogeneity of the galactic space and its influence on Earth's seismic activity. The work of Boris Gavrilovich Tarasov, Doctor of Engineering, on the study of space factors and their relation to geodynamic and seismic activity. How do galaxies of the Local Group - the Andromeda Galaxy and Magellanic Clouds - affect tectonic shifts on Earth? Oscillation of the Earth's core - opinions of the research fellows of the Institute of Geology, Alexander Andreevich Pushkin and Vyacheslav Sergeevich Rimkevich. How does the transition from one sign to another along the magnetic field of the Milky Way affect our planet? The galaxy as a single electromagnetic system and a regulator of the energy state of the Solar system. Why are Mars, Triton, Pluto and Jupiter warming? Warning from the ancients in the form of ancient calendars, tales and legends about the events of the coming decades! How can we get out of the current climatic situation and what should we do? What do we need to do today to reach a new level of science? Psychiatrists from various countries talked to the world’s 1st artificial consciousness Jackie https://www.youtube.com/watch?v=On-1LUNyzXo Climate Change. The Beginning of a Big Disaster https://www.youtube.com/watch?v=0qReBeqXcIM Video CREATIVE SOCIETY https://www.youtube.com/watch?v=R4C-SQCqqA4 The "AllatRa" book by Anastasia Novykh https://allatra.tv/en/book/anastasia-novykh-allatra Email: climate@allatra.tv #history #megaliths #AncientCivilizations #climate #ALLATRA

Cosmic Queries – Science is Cool 4

StarTalk Radio

Play Episode Listen Later Dec 7, 2020 52:16

Neil deGrasse Tyson and Chuck Nice answer Cosmic Queries about the secrets of the universe, science curriculum, tackling religion in the classroom, and more for a remote audience of thousands of science teachers. Recorded live at ScIC4 in collaboration with PocketLab. NOTE: StarTalk+ Patrons can watch or listen to this entire episode commercial-free here: https://www.startalkradio.net/show/cosmic-queries-science-is-cool-4/ Thanks to our Patrons Joshua Ratcliffe, Mick Pirgmann, Jason Sills, Kyle Marston, Russell House, William Martin, Sami Succar, Christopher Ludwig, David Root, Mike Staber, and Andy Green for supporting us this week. Photo Credit: ESO/S. Brunier, CC BY 4.0, via Wikimedia Commons See omnystudio.com/listener for privacy information.

science religion astronomy neil degrasse tyson astronomers science podcast star talk space podcast andy green william martin chuck nice startalk radio science curriculum cosmic queries magellanic clouds astronomy podcast pocketlab

Dark Energy Camera Takes Detailed Pics of Magellanic Clouds

The Daily Space

Play Episode Listen Later Dec 4, 2020 26:34

The Dark Energy Camera captures SMASHingly detailed images of the Large and Small Magellanic Clouds, assisting in an attempt to map the two structures and understand their history. Plus formation of the Moon, a new atlas of the Universe, and an interview with PSI scientist Dr. Jordan Steckloff.

moon universe large camera pics detailed psi dark energy magellanic clouds

What are the Magellanic Clouds?

Astronomy Minute

Play Episode Listen Later Nov 6, 2020 1:58

A brief description of two dwarf galaxies known as the Large and Small Magellanic Clouds that are in orbit around own Milky Way galaxy .

large milky way magellanic clouds

Episode 689: Open Space 90: Could We Drill for Life on Mars? And More...

Universe Today Podcast

Play Episode Listen Later Oct 6, 2020

In this week's live questions show, I answer questions about drilling for microbes on Mars, missions that could survive the surface of Venus, and if anyone else is dissatisfied with the Big Bang. 00:00 Start 04:18 Any updates on the Chinese mission to Mars? 05:41 How many exoplanets are confirmed? 07:18 Can any rovers drill for microbes? 10:31 Any ways to survive the surface of Venus? 13:10 How do you know if an exoplanet has cleared its path? 15:31 Is anyone dissatisfied with the Big Bang? 19:50 Favorite solution to Planet 9? 21:48 When did I start getting interested in space? 22:55 How likely is the Venus phosphine abiotic? 27:45 How intense is the radiation field at Jupiter? 28:54 Will I ever stream video games? 34:03 Could we detect planets in the Magellanic Clouds 36:13 Would would life be like near a black hole? 38:40 How many launches have I seen? 41:50 Is quantum mechanics a big hoax? 42:35 Good targets for astrophotography? 44:04 Raised by Wolves? 45:02 Are we living in a black hole? 45:31 When will there be lunar tourism? 45:60 Have I read Artemis? 47:20 Is the Universe computable? 47:41 How can the Universe expand faster than the speed of light? 50:00 Why is the Moon drifting away from us? 52:00 Do we know how fast the Universe is expanding? 53:17 Do Mercury and Venus pass in front of the Sun? 54:35 Most significant scientific advance in the last 20 years? 55:43 Is the expansion rate different in the Universe? 58:10 Will we screw up the climate permanently? 59:43 Wrap up Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: https://www.patreon.com/universetoday More stories at: https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.comSupport Universe Today Podcast

chinese moon universe mars wrap twitch sun planet raised wolves jupiter big bang artemis drill life on mars open space our book astronomy cast magellanic clouds weekly space hangout universe today ultimate viewing cosmos

Magellanic Cloud Stars Discovered in the Milky Way

SpaceTime with Stuart Gary | Astronomy, Space & Science News

Play Episode Listen Later Feb 21, 2020 45:25

The astronomy and space science news podcast.Stream podcast episodes on demand from www.bitesz.com/spacetime (mobile friendly). SpaceTime with Stuart Gary Series 23 Episode 16*Magellanic Cloud stars discovered in the Milky WayAstronomers have discovered stars made out of material from two nearby dwarf galaxies known as the Magellanic Clouds in the Milky Way. *Space Travel brain damage studyA study reported in the journal eNuro has found that exposure to chronic, low dose radiation - the conditions present in deep space – would cause neural and behavioural impairments in astronauts. *Soyuz returns Expedition 61 crewThree members of the International Space Station’s Expedition 61 crew have returned safely to Earth aboard their Soyuz MS-13 capsule. *Iran satellite failureIran has failed in its latest attempt to launch a satellite into orbit – but the launch was very successful as a missile test. *Preserving the night skyOne of the great sights in the southern nights’ skies is the iconic constellation of the Southern Cross. *The Science ReportA new study warns that Arctic ice melt caused by global warming is changing ocean currents.Researchers say probiotic bacteria, commonly used in yoghurt could help inflammatory disorders.A new study has found teens are struggling to control their impulses online.Ancient virus and bacteria found in ice core drill samples from Tibet.New research claims a dog’s tendency to yawn when you do doesn’t mean they like you.72 percent of people have used Dr Google rather than a real doctor at least once. For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimeshownotesSponsor Details: For one month's free access to The Great Courses Plus just visit www.thegreatcoursesplus.com/spaceGet immediate access to over 175 commercial-free, double episode editions of SpaceTime plus extended interview bonus content. Subscribe via Patreon or Supercast....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary or if you’re not a fan of Patreon, go to Supercast - https://bitesznetwork.supercast.tech/ RSS feed: https://rss.acast.com/spacetime Email: SpaceTime@bitesz.com To receive the Astronomy Daily Newsletter free, direct to your inbox...just join our mailing list at www.bitesz.com/mailinglist Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.

Cosmic Queries – Everyday Astrophysics, with Russell Peters

StarTalk Radio

Play Episode Listen Later Mar 29, 2019 50:00

Neil deGrasse Tyson and comic co-host Russell Peters answer fan-submitted questions on a variety of astrophysical topics including Pluto, the Andromeda Galaxy, the Magellanic Clouds, the Equator and the Earth’s axis, E = mc2, exoplanets, the Moon, and more! NOTE: StarTalk All-Access subscribers can watch or listen to this entire episode commercial-free here: https://www.startalkradio.net/all-access/cosmic-queries-everyday-astrophysics-with-russell-peters/ Photo Credit: StarTalk®.

earth comedy moon planet pluto neil degrasse tyson astrophysics science podcast star talk russell peters equator space podcast intelligent life andromeda galaxy phy cosmic events cosmic queries magellanic clouds astronomy podcast

Astrophiz 73: Best of 2018

Play Episode Listen Later Dec 25, 2018 51:40

Astrophiz 73: ‘Best of 2018’ Astrophysics Please enjoy this ‘Best of 2018 Astrophiz’ episode where we have our 3 most popular astrophysics interviews for 2018. I have removed my ’News’ ramblings and Dr Ian Musgrave's ‘What’s up Doc’ segments from these three episodes so you can listen to these three astrophysicists without any distractions in a single episode. (51min) Today’s first feature interview is with Dr Jane Kaczmarek, ( @jfKaczmarek ) who gives us the state of play on the new receivers on the 64m Parkes dish and what it’s like to work climbing way up above the dish to do her work in the focus cabin. Back in June in Episode 60, Jane told us about growing up in Wisconsin and how her love of astronomy developed, and how her penchant for asking questions and her serendipitous move out to Australia and how her PhD on immense magnetic fields spanning the Magellanic Clouds has lead her to work with the CSIRO as the commissioning scientist for the UWL receiver on the 64m Parkes dish that bought us vision of the Apollo moon landing. In the last couple of weeks, Jane has steered the Parkes dish to receive the tenuous signals from Voyager II, as it departs the heliosphere for interstellar space. Or next interview features one of the icons of modern astronomy, Professor Lisa Harvey-Smith, ( @lisaharveysmith ) Astronomy researcher, author and presenter of ABC television's Stargazing Live. She uses the world's largest radio telescopes to study the life cycle of stars and develops new world-leading precursor telescopes building the Square Kilometre Array. We find out how she left school at 11 and now has a Doctorate in radio astronomy and Masters in Physics with Honours in Astronomy & Astrophysics. She has scores of refereed journal papers to her name and her first book: "When Galaxies Collide" was recently released and you can order the paperback or digital version from Melbourne University Press. She has won the Eureka Prize and CSIRO Chairman's Medal and runs a popular international astronomy distance learning course. She has just returned from a sold-out national speaking tour. In our final interview in this ‘ Best of 2018' series we are speaking with astrophysicist and Indigenous Astronomer Kirsten Banks who is a proud Wiradjuri woman and the Indigenous Astronomy Educator at the Sydney Observatory. She is a highly respected scientist and advocate for indigenous astronomy. Listen to Kirsten's wonderful ’The Skyentists’ podcasts with Dr. Ángel López-Sánchez @El_Lobo_Rayado

Tanked Up 140 – Our Favourite Marvel Games

Tanked Up

Play Episode Listen Later Nov 16, 2018 98:16

Aadil and Ben get together to discuss their favourite Marvel games in memory of the illustrious Stan Lee. These include Marvel licensed games through the years like The Incredible Hulk, Ultimate Alliance and Marvel Vs Capcom. Before this they discuss Alphabear 2 which Ben’s had a couple of days with in between his Red Dead Redemption 2 sessions. Whilst returning to RDR2 they also chat GTA Online, Saints Row 2, Red Dead Online, GTA San Andreas and Dark Age of Camelot. This week Aadil drinks two beers from Manual Brewing. He begins with ‘My Favourite Hero’ gose and follows it with ‘Tickets Please’ DIPA. Ben’s beers loosely revolve around a piece of furniture. He starts with ‘Freak Scene’ NEIPA from […]

Tanked Up 140 – Our Favourite Marvel Games

Tanked Up

Play Episode Listen Later Nov 16, 2018 98:16

Aadil and Ben get together to discuss their favourite Marvel games in memory of the illustrious Stan Lee. These include Marvel licensed games through the years like The Incredible Hulk, Ultimate Alliance and Marvel Vs Capcom. Before this they discuss Alphabear 2 which Ben's had a couple of days with in between his Red Dead Redemption 2 sessions. Whilst returning to RDR2 they also chat GTA Online, Saints Row 2, Red Dead Online, GTA San Andreas and Dark Age of Camelot. This week Aadil drinks two beers from Manual Brewing. He begins with 'My Favourite Hero' gose and follows it with 'Tickets Please' DIPA. Ben's beers loosely revolve around a piece of furniture. He starts with 'Freak Scene' NEIPA from Beer52s Table project and moves onto 'Magellanic Clouds' a Table Beer from Lervig.

Astrophiz 68: Dr jane Kaczmarek

history australia earth education space new zealand lecture astronomy northern hemisphere southern hemisphere pointers southern star magellanic clouds

Play Episode Listen Later Oct 18, 2018 41:11

This is the first of our series of 6 ‘Astrotour’ episodes of Astrophiz, where we’ll be publishing recordings of interviews I did on a two and a half thousand kilometre tour of five of Australia’s finest Eastern state radio and optical observatories. Astrophiz 68: Dr Jane Kaczmarek -Ultra wide band receiver commissioning scientist PLUS: 'What's up Doc' with Dr @ianfmusgrave Today’s feature interview is with Dr Jane Kaczmarek, @jfKaczmarek, who gives us the state of play on the new receivers on the 64m Parkes dish and what it’s like to work climbing way up above the dish to do her work in the focus cabin. Back in June in Episode 60, Jane told us about growing up in Wisconsin and how her love of astronomy developed, and how her penchant for asking questions and her serendipitous move out to Australia and how her PhD on immense magnetic fields spanning the Magellanic Clouds has lead her to work with the CSIRO as the commissioning scientist for the UWL receiver on the 64m Parkes dish that bought us vision of the Apollo moon landing. In our regular segment for astrophotographers and observers, Dr Ian 'Astroblog’ Musgrave presents ‘What’s Up Doc?’ we congratulate hime on his latest Award for promoting Reason in the media and then he tells us what's up in the evening, night and morning skies for the next two weeks. In this episode he tells us about the planets and comets currently visible to the naked eye, and his meeting with famed indigenous astronomer Dr Kirsten Banks. (see Ep 53) In the News: 1. Australian ICRAR researchers using the CSIRO ASKAP radio telescope in remote Western Australia have nearly doubled the known number of ‘fast radio bursts’— powerful flashes of radio waves from deep space. 2. Some ingenious sciencing from a remote desert region in Western Australia. Imaging the Moon with MWA spider antennas may be the key to unlocking how the first stars and galaxies shaped the early Universe. See video at https://tinyurl-DOT-com/radiomoonshine

australia news phd moon universe wisconsin apollo reason doc western australia imaging csiro parkes up doc mwa jane kaczmarek uwl magellanic clouds astrotours

Ep. 25 Southern Stars

HD and the Void

Play Episode Listen Later May 6, 2018 18:21

I live in the Northern Hemisphere of Earth, which means I see some constellations and stars that people in the Southern Hemisphere don't see. The opposite is true as well, and it's more interesting for me to talk about the constellations I don't get to see, so please enjoy an episode on the important constellations that appear in the Southern Hemisphere: Crux, the Pointers, and the Magellanic Clouds. Bonus: Aurora Australis!

9: New model links high energy cosmic rays, neutrinos, and gamma rays

SpaceTime with Stuart Gary | Astronomy, Space & Science News

Play Episode Listen Later Feb 2, 2018 33:41

*New model links high energy cosmic rays, neutrinos, and gamma rays One of the biggest mysteries in astro-particle physics may have been solved by a new model linking ultrahigh-energy cosmic rays, very high-energy neutrinos, and high-energy gamma rays to supermassive black holes. *Black Hole discovered hiding in globular cluster Astronomers have for the first time discovered an inactive black hole hiding silently in the heart of a globular cluster. *New study could help predict volcanic eruptions Scientists have found a link between volcanic activity and tidal cycles. *February Skywatch We check out Orion, the Pleiades, Sirius and the Magellanic Clouds on February’s Skywatch. *The Science Report The oldest human fossil discovered outside Africa found in an Israeli cave. Using tiny crystals to predict volcanic eruptions. Discovery of a link between vitamin D blood levels and respiratory health. Scientists discover that most female cats are right handed. For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimeshownotes Subscribe, rate and review SpaceTime at all good podcasting apps…including Apple Podcasts (formerly iTunes), Google Podcasts, Stitcher, PocketCasts, Podbean, Radio Public, Tunein Radio, google play, Spreaker etc Would you prefer to have access to the special commercial free version of SpaceTime? Help support the show, subscribe at Patreon....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary Help support SpaceTime : The SpaceTime with Stuart Gary merchandise shop. Get your T-Shirts, Coffee Cups, badges, tote bag + more and help support the show. Check out the range: http://www.cafepress.com/spacetime Thank you. Plus: As a part of the SpaceTime family, you can get a free audio book of your choice, plus 30 days free access from audible.com. Just visit www.audibletrial.com/spacetime or click on the banner link at www.spacetimewithstuartgary.com Email: SpaceTime@bitesz.com Join our mailing list at http://www.bitesz.com/join-our-mailing-list Learn more about your ad choices. Visit megaphone.fm/adchoices Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.

Astrophiz 48: Dr Jacinta Delhaize 'Star-forming frenzy'

Steward Observatory Public Evening Lecture Series

Play Episode Listen Later Nov 30, 2017 59:10

Astrophiz 48: Dr Jacinta Delhaize 'Star-forming frenzy' In this fabulous extended 60min episode we feature Dr Jacinta Delhaize who is a Postdoctoral Researcher at University of Zagreb, Faculty of Science in Croatia. Jacinta has devolved a ‘stacking technique’ to combine data to overcome the problem of detecting weak hydrogen signals from distant galaxies. She has been using data from the Parkes Dish and the Hershel instrument to helps us understand the role of hydrogen in the evolution of galaxies. After recently moving from ICRAR in Western Australia to Croatia, her research is now looking at how black holes at the centres of galaxies can effect star formation, and is now using data from the Jansky VLA to continue this collaborative research. For observers and astrophotographers, Dr Ian ‘Astroblog’ Musgrave tell us what to look for in our morning and evening skies over the next days and weeks, and how to best observe the imminent Geminid Meteor Shower. In ‘ian’s tangent’ he tells us about Australia’s early eminence in Space with the 50th Anniversary of the launch of our first satellite, WRESAT Jacinta has an excellent youtube vid and you can see her describe her research on the infrared-radio correlation of galaxies at tinyurl.com/jdelhaize Her website is at www.jacintadelhaize.com and she also has a public twitter and instagram account. Both are @jdelhaize In the news: Teams of Radio astronomers and optical astronomers both research the Magellanic Clouds in the Southern hemisphere, and both teams come up with exciting discoveries.

university australia science space radio southern faculty croatia western australia zagreb postdoctoral researcher hershel delhaize geminid meteor shower magellanic clouds

Ep. 5 Star Classifications Part 1: Leavitt and Variable Stars

HD and the Void

Play Episode Listen Later Jun 4, 2017 31:13

First in a two-part series about stars and how we classify them. Variables are a very specific kind of star that have a regular variation in brightness, like a heartbeat. They were first categorized and analyzed by Henrietta Swan Leavitt at the turn of the 20th century at Harvard University, along with other women computers at the time. Leavitt noticed variable stars in the Magellanic Clouds and came up with her luminosity law, where the pulse rates of Cepheid variable stars are proportional to their luminosity—the brighter they are, the greater their period is. This law helped estimate interstellar and intergalactic distances. Cepheids and other kinds of variable stars have helped astronomers map out the size of our galaxy, the spaces between celestial objects, and the distance to the outer reaches of our universe.

history space stars feminism harvard university lecture astronomy variable classification variables leavitt cepheid henrietta swan leavitt magellanic clouds cepheids

Extra: Data & Discoveries from ESA's Gaia Mission

AWESOME ASTRONOMY

Play Episode Listen Later May 11, 2017 7:17

This podcast extra episode comes from this year's Big Bang Fair and Jeni & Paul grabbed an interview with a Gaia mission data scientist to talk data and the efforts taken in the less-glamorous, but absolutely critical, background to provide us with the discoveries and refinements we crave from the European Space Agency's latest space-based astrometry mission. So while Paul and Jeni were there as the Sirius Space Agency explaining the science behind a mission into space on the Star Stage, they spoke to a post-doctoral researcher at Cambridge University's Data Processing Centre for the Gaia Mission. In this interview we bring you: the timelines to data capture, recovery, capture and analysis the rapid pulication of results from Gaia data a surprising discovery about the Milky Way's satellite galaxies - the Magellanic Clouds a new star cluster found hiding behind a star

The Large and Small Magellanic Clouds and Their Interaction with the Milky Way

Play Episode Listen Later Sep 29, 2014 73:43

large interaction milky way magellanic clouds

Milky Way and Satellite Galaxies Are Rare Arrangement

60-Second Space

Play Episode Listen Later Aug 28, 2012 1:15

Only about 0.5 percent of Milky Way-like galaxies have companions like our satellite galaxies, the Magellanic Clouds. John Matson reports

rare satellites milky way arrangement galaxies magellanic clouds john matson

Trespassing and Larceny: The Sordid History of the Magellanic Clouds

Steward Observatory Public Evening Lecture Series

Play Episode Listen Later Nov 14, 2011 58:58

Prof. Zaritsky's research focuses on questions of galaxy structure, dynamics, and evolution. This includes issues related to dark matter, factors that influence star formation rates, and chemical evolution. He is currently concentrating on galaxy scaling laws, the outer regions of disk galaxies, and the role of environment in galaxy evolution. To do this, he uses both space and ground based telescopes to study nearby (z < 1) galaxies. Presented November 14, 2011.

prof trespassing larceny sordid history magellanic clouds presented november

Large Magellanic Cloud

Play Episode Listen Later Jul 26, 2011 1:07

Transcript: When Magellan traveled round the world in the early sixteenth century, there was no bright star near the southern celestial pole, so for navigation he used two glowing patches of light which became known the Magellanic Clouds. But of course, they must have been known throughout prehistory and were undoubtedly the subject of myth and legend. They’re companions to the Milky Way galaxies, and they are extremely important in astronomy because their stellar nurseries are close enough to get a detailed view and identify individual examples of rare stellar populations such as RR Lyraes, Cepheids, novae, planetary nebulae, and more exotic variable stars.

milky way large magellanic cloud magellanic clouds cepheids

Magellanic Clouds

Play Episode Listen Later Jul 26, 2011 0:47

Transcript: When Magellan traveled round the world in the early sixteenth century, there was no bright star near the southern celestial pole, so for navigation he used two glowing patches of light which became known the Magellanic Clouds. But of course, they must have been known throughout prehistory and were undoubtedly the subject of myth and legend. They’re companions to the Milky Way galaxies, and they are extremely important in astronomy because their stellar nurseries are close enough to get a detailed view and identify individual examples of rare stellar populations such as RR Lyraes, Cepheids, novae, planetary nebulae, and more exotic variable stars.

milky way magellanic clouds cepheids

Local Group

milky way andromeda local group m31 magellanic clouds

Play Episode Listen Later Jul 26, 2011 0:58

Transcript: Let’s explore a region of space centered on the Milky Way galaxy, a cube a million parsecs or a megaparsec on a side. That’s equivalent to three and a quarter million lightyears. We would find a collection of galaxies called the local group. There are two large galaxies in the Local Group, the Milky Way and Andromeda, M31, separated by three quarters of a million parsecs. M33 is near M31, and the remainder of the space contains only two dozen or so dwarfs clumped around the Milky Way and M31. In the analogy of a living room, the Milky Way and M31 would be like dinner plates twenty feet apart. The Magellanic Clouds would be two cotton balls within a foot of the Milky Way, and all the other dwarf galaxies would be other cotton balls clumped around the Milky Way and Andromeda.

Properties of Galaxies