Podcasts about erosita

Seit drei Jahren befindet sich das deutsche Röntgenteleskop Erosita auf dem russischen Spektrumsatelliten im Schlafmodus. Das Deutsche Luft- und Raumfahrtzentrum und die Max-Planck-Gesellschaft hatten nach Kriegsbeginn die Kooperation auf Eis gelegt. Lorenzen, Dirk www.deutschlandfunk.de, Sternzeit

On The Space Show for Wednesday, 29 May 2024: Australian Space Industry News: * Melbourne University's SpIRIT satellite survives global solar storm, returns picture from space * Astronaut graduation ceremony for Katherine Bennell-Pegg (Inserts courtesy ESA) * Gilmour Space still awaiting launch permit for its Eris orbital launch vehicle. Planet 9: New evidence suggests that a planet orbits in trans-Neptunian space. X-Ray Imaging and Spectroscopy Mission (XRISM) and Resolve: Resolve is an X-ray microcalorimeter developed by NASA and the Goddard Space Flight Center. eROSITA: * Findings by the eROSITA instrument on the Russian Spectrum Roentgen Gamma satellite of a very hot, ionized gas surrounding the Milky Way galaxy * Also resolves one of the cosmological tensions regarding the clumpiness of the universe. Update on China's Chang'e 6 mission Planet Earth — Episode 63: * Launch of PREFIRE 1 and EarthCARE. (Inserts courtesy Rocket Lab and ESA)

Das Röntgenteleskop EROSITA auf dem russisch-deutschen Satelliten Spektrum-RG beobachtet das energiereiche Universum. Während die Zusammenarbeit mit Russland auf der ISS einfach weiter geht, liegt das Teleskop seit zwei Jahren still. Lorenzen, Dirk www.deutschlandfunk.de, Sternzeit

Bentornati! Oggi ospito Marcella Brusa, professoressa ordinaria dell'Università di Bologna, ricercatrice all'interno di numerosi progetti, tra i quali eRosita, nonchè mia professoressa che mi ha ispirato a cominciare questo percorso. Parliamo di come si è approcciata all'astronomia, all'astrofisica, al suo periodo di grande crescita presso il Max Planck Institut fuer Extraterrestrische Physik (MPE) in Germania, della sua ricerca che ha spaziato tra numerose lunghezze d'onda ed energie della luce, per poi tornare a Bologna dove è diventata professoressa.  Ma soprattutto parliamo di come l'astrofisica dai raggi X alle onde infrarosse l'ha accompagnata e guidata nella sua ricerca. Vorrei inoltre ringraziare tutto il gruppo che ha dato vita al progetto ONSCI, Laura Fabbri, Samuele Sanna, Olivia Levrini e ovviamente Marcella Brusa. Ringrazio ancora per la partecipazione la prof.ssa Marcella Brusa. Per sapere di più sulla missione eRosita: - https://www.mpe.mpg.de/eROSITA - https://www.media.inaf.it/2024... Per seguirci sui nostri social : -Facebook: https://www.facebook.com/plane... -Instagram: https://www.instagram.com/plan... -Twitter: https://twitter.com/planetario... -Sito : https://www.planetariodimodena... Musica della sigla: We Ride! - Reed Mathis

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy:Cara A:-La pérdida de cola en humanos: (5:00)-Calentamiento de atmósferas en exoplanetas de corto periodo por corrientes eléctricas (37:10)Este episodio continúa en la Cara B.Contertulios: Héctor Socas, Francis Villatoro. Imagen de portada realizada con Midjourney. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso Hosted on Acast. See acast.com/privacy for more information.

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy:Cara B:-El experimento de gravitación clásica en miligramos: (19:58)-Longevidad de los tecnomarcadores y la ley de Lindy (43:13)-El resultado de eRosita sobre S8 (1:10:28)-Señales de los oyentes (1:38:58)Este episodio es continuación de la Cara A.Contertulios: Héctor Socas, Francis Villatoro. Imagen de portada realizada con Midjourney. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso Hosted on Acast. See acast.com/privacy for more information.

In Folge 98 wird es verrückt! Nachdem Ruth einmal kurz nachsieht, was die ganzen großen Teleskope gerade treiben (sehr viel!), beschäftigen wir uns mit Bananen. “Going Bananas” sagt man, wenn jemand durchdreht. Und genau das haben die Medien auch geschrieben, als man bananenförmige Galaxien entdeckt hat. Die aber natürlich nicht wirklich die Form einer Banane haben. Irgendwie aber schon. Warum das höchst spannend ist, erfahrt ihr in der neuen Folge. Außerdem: Das Roman-Teleskop wird weiter gebaut, JWST findet super Spiralen und schmutzige Sterne, Deutschland und Russland kämpfen um das halbe Universum und Evi erklärt, warum “The Day after Tomorrow” gar kein so schlechter Film ist, wie man glaubt. Wenn ihr uns unterstützen wollt, könnt ihr das hier tun: https://www.paypal.com/paypalme/PodcastDasUniversum Oder hier: https://steadyhq.com/de/dasuniversum Oder hier: https://www.patreon.com/dasuniversum

Le centre de notre galaxie a connu dans le passé des événements de sursaut de rayons cosmiques, qui ont été responsables des bulles de Fermi visibles aujourd'hui en rayons gamma et des bulles de eROSITA visibles en rayons X. Aujourd'hui, un duo de chercheurs pense avoir décelé une trace de positrons provenant de ces mêmes événements dans le détecteur orbital AMS-02. Ils publient leur étude dans The Astrophysical Journal.

Dans une étude publiée dans Nature Astronomy, une équipe d'astrophysiciens montre que les "bulles eRosita", visibles en rayons X et qui s'étendent de part et d'autre du disque de la Voie Lactée n'ont probablement pas pour origine une activité passée du trou noir Sgr A* comme on le pensait...

Youtubeチャンネルも更新中 https://www.youtube.com/channel/UCHW6gg92z7E7hdnhbStpzTA Instagram（ryo_astro） https://www.instagram.com/ryo_astro/ 個人ホームページはこちら！ http://ryosasaki.net/ Voicy https://voicy.jp/channel/1726 Twitter（_ryo_astro) https://twitter.com/_ryo_astro note https://note.com/ryo_sasaki ジングル作成：モリグチさんfromワクワクラジオ https://open.spotify.com/show/3LYTJRlUlb9wU7geQyoDzE?si=c178010fd8154ea9 ソース https://www.ipmu.jp/ja/20221227-eROSITA --- Send in a voice message: https://podcasters.spotify.com/pod/show/ryo-sasaki/message

Wat bevindt zich in het centrum van onze Melkweg? Ja, een zwart gat. Maar verder? Er valt nog een hoop interessants over te melden.Een stukje uit een YouTube video met daarin een timelapse van sterren in het centrum van onze Melkweg: https://youtube.com/clip/Ugkxbbc2UQf62gEQ1XPaWU70BTLJ6WaFqj2-Artikel "Fermi and eRosita bubbles as relics of the past activity of the Galactic black hole":https://arxiv.org/pdf/2203.02526.pdfStellarium als computerprogramma:https://stellarium.org/Stellarium als app:https://www.stellarium-labs.com/Stellarium op het web:https://stellarium-web.org/De muziek van [Moos]:https://linktr.ee/moosdohmen De Zimmerman en Space podcast is gelicenseerd onder een Creative Commons CC0 1.0 licentie.http://creativecommons.org/publicdomain/zero/1.0

The eROSITA Final Equatorial-Depth Survey eFEDS : X-ray properties of Subaru optically-selected clusters by N. Ota et al. on Monday 28 November We present the results of a systematic X-ray analysis of optically rich galaxy clusters detected by the Subaru HSC survey in the eROSITA eFEDS field. Through a joint analysis of SRG/eROSITA and Subaru/HSC surveys, we aim to study the dynamical status of the optically selected clusters and derive the cluster scaling relations. The sample consists of 43 optically selected galaxy clusters with a richness $>40$ in $0.16

Tempestuous life beyond R500: X-ray view on the Coma cluster with SRG eROSITA II Shock & Relic by E. Churazov et al. on Monday 28 November This is the second paper in a series of studies of the Coma cluster using the SRG/eROSITA X-ray data obtained during calibration and performance verification observations. Here we focus on the region adjacent to the radio source 1253+275 (Radio Relic, RR hereafter). We show that the X-ray surface brightness steepest gradient at $sim 79'$ ($sim 2.2,{rm Mpc}approx R_{200c}$) is almost co-spatial with the outer edge of RR. As in several other relics, the Mach number of the shock derived from the X-ray surface brightness profile ($M_Xapprox 1.9$) appears to be lower than needed to explain the slope of the integrated radio spectrum in the diffusive shock acceleration (DSA) model ($M_Rapprox 3.5$) if the magnetic field is uniform and the radiative losses are fast. However, the shock geometry is plausibly much more complicated than a spherical wedge centered on the cluster, given a non-trivial correlation between radio, X-ray, and SZ images. While the complicated shock geometry alone might bias $M_X$ low, we speculate on a few other possibilities that can affect the $M_X$-$M_R$ relation, including the shock sub-structure that might be modified by the presence of non-thermal filaments stretching across the shock and propagation of relativistic electrons along the non-thermal filaments with a high magnetic field. We also discuss the "history" of the radio galaxy NGC4789 located ahead of the relic in the context of the Coma-NGC4839 merger scenario. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2205.07511v2

X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6 56 by Julien Wolf et al. on Monday 28 November This study aims at identifying luminous quasars at $z>5.7$ among X-ray-selected sources in the eROSITA Final Equatorial-Depth Survey (eFEDS) in order to place a lower limit on black hole accretion well into the epoch of re-ionisation. We confirm the low significance detection with eROSITA of a previously known, optically faint $z=6.56$ quasar from the Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs) survey. We obtained a pointed follow-up observation of the source with the Chandra X-ray telescope in order to confirm the eROSITA detection. Using new near-infrared spectroscopy, we derived the physical properties of the super-massive black hole. Finally, we used this detection to infer a lower limit on the black hole accretion density rate at $z>6$. The Chandra observation confirms the eFEDS source as the most distant blind X-ray detection to date. The derived X-ray luminosity is high with respect to the rest-frame optical emission of the quasar. With a narrow MgII line, low derived black hole mass, and high Eddington ratio, as well as its steep photon index, the source shows properties that are similar to local narrow-line Seyfert 1 galaxies, which are thought to be powered by young super-massive black holes. In combination with a previous high-redshift quasar detection in the field, we show that quasars with $L_{2-10 , mathrm{keV}} >10^{45} , mathrm{erg , s^{-1}}$ dominate accretion onto super-massive black holes at $zsim 6$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.13820v1

X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6 56 by Julien Wolf et al. on Sunday 27 November This study aims at identifying luminous quasars at $z>5.7$ among X-ray-selected sources in the eROSITA Final Equatorial-Depth Survey (eFEDS) in order to place a lower limit on black hole accretion well into the epoch of re-ionisation. We confirm the low significance detection with eROSITA of a previously known, optically faint $z=6.56$ quasar from the Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs) survey. We obtained a pointed follow-up observation of the source with the Chandra X-ray telescope in order to confirm the eROSITA detection. Using new near-infrared spectroscopy, we derived the physical properties of the super-massive black hole. Finally, we used this detection to infer a lower limit on the black hole accretion density rate at $z>6$. The Chandra observation confirms the eFEDS source as the most distant blind X-ray detection to date. The derived X-ray luminosity is high with respect to the rest-frame optical emission of the quasar. With a narrow MgII line, low derived black hole mass, and high Eddington ratio, as well as its steep photon index, the source shows properties that are similar to local narrow-line Seyfert 1 galaxies, which are thought to be powered by young super-massive black holes. In combination with a previous high-redshift quasar detection in the field, we show that quasars with $L_{2-10 , mathrm{keV}} >10^{45} , mathrm{erg , s^{-1}}$ dominate accretion onto super-massive black holes at $zsim 6$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.13820v1

Misaligned jets from Sgr A ^* and the origin of Fermi eROSITA bubbles by Kartick C. Sarkar et al. on Friday 25 November One of the leading explanations for the origin of Fermi Bubbles is a past jet activity in the Galactic center supermassive black hole Sgr A$^*$. The claimed jets are often assumed to be perpendicular to the Galactic plane. Motivated by the orientation of pc-scale nuclear stellar disk and gas streams, and a low inclination of the accretion disk around Sgr A$^*$ inferred by the Event Horizon Telescope, we perform hydrodynamical simulations of nuclear jets significantly tilted relative to the Galactic rotation axis. The observed axisymmetry and hemisymmetry (north-south symmetry) of Fermi/eROSITA bubbles (FEBs) due to quasi-steady jets in Sgr A$^*$ can be produced if the jet had a super-Eddington power ($gtrsim 5times 10^{44}$ erg s$^{-1}$) for a short time (jet active period $lesssim 6$ kyr) for a reasonable jet opening angle ($lesssim 10^circ$). Such powerful explosions are, however, incompatible with the observed O VIII/O VII line ratio towards the bubbles, even after considering electron-proton temperature non-equilibrium. We argue that the only remaining options for producing FEBs are i) a low-luminosity ($approx 10^{40.5-41}$ erg s$^{-1}$)) magnetically dominated jet or accretion wind from the Sgr A$^*$, and ii) a SNe or TDE driven wind of a similar luminosity from the Galactic center. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12967v1

Misaligned jets from Sgr A ^* and the origin of Fermi eROSITA bubbles by Kartick C. Sarkar et al. on Thursday 24 November One of the leading explanations for the origin of Fermi Bubbles is a past jet activity in the Galactic center supermassive black hole Sgr A$^*$. The claimed jets are often assumed to be perpendicular to the Galactic plane. Motivated by the orientation of pc-scale nuclear stellar disk and gas streams, and a low inclination of the accretion disk around Sgr A$^*$ inferred by the Event Horizon Telescope, we perform hydrodynamical simulations of nuclear jets significantly tilted relative to the Galactic rotation axis. The observed axisymmetry and hemisymmetry (north-south symmetry) of Fermi/eROSITA bubbles (FEBs) due to quasi-steady jets in Sgr A$^*$ can be produced if the jet had a super-Eddington power ($gtrsim 5times 10^{44}$ erg s$^{-1}$) for a short time (jet active period $lesssim 6$ kyr) for a reasonable jet opening angle ($lesssim 10^circ$). Such powerful explosions are, however, incompatible with the observed O VIII/O VII line ratio towards the bubbles, even after considering electron-proton temperature non-equilibrium. We argue that the only remaining options for producing FEBs are i) a low-luminosity ($approx 10^{40.5-41}$ erg s$^{-1}$)) magnetically dominated jet or accretion wind from the Sgr A$^*$, and ii) a SNe or TDE driven wind of a similar luminosity from the Galactic center. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12967v1

Hydrostatic Mass Profiles of Galaxy Clusters in the eROSITA Survey by Dominik Scheck et al. on Wednesday 23 November To assume hydrostatic equilibrium between the intracluster medium and the gravitational potential of galaxy clusters is an extensively used method to investigate their total masses. We want to test hydrostatic masses obtained with an observational code in the context of the SRG/eROSITA survey. We use the hydrostatic modeling code MBProj2 to fit surface-brightness profiles to simulated clusters with idealized properties as well as to a sample of 93 clusters taken from the Magneticum Pathfinder simulations. We investigate the latter under the assumption of idealized observational conditions and also for realistic eROSITA data quality. The comparison of the fitted cumulative total mass profiles and the true mass profiles provided by the simulations allows to gain knowledge about the reliability of our approach. Furthermore, we use the true profiles for gas density and pressure to compute hydrostatic mass profiles based on theory for every cluster. For an idealized cluster that was simulated to fulfill perfect hydrostatic equilibrium, we find that the cumulative total mass at the true $r_{500}$ and $r_{200}$ can be reproduced with deviations of less than 7%. For the clusters from the Magneticum Pathfinder simulations under idealized observational conditions, the median values of the fitted cumulative total masses at the true $r_{500}$ and $r_{200}$ are in agreement with our expectations, taking into account the hydrostatic mass bias. Nevertheless, we find a tendency towards a too high steepness of the cumulative total mass profiles in the outskirts. For realistic eROSITA data quality, this steepness problem intensifies for clusters with high redshifts and thus leads to too high cumulative total masses at $r_{200}$. For the hydrostatic masses based on the true profiles known from the simulations, we find a good agreement with our expectations concerning the hydrostatic mass. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12146v1

Hydrostatic Mass Profiles of Galaxy Clusters in the eROSITA Survey by Dominik Scheck et al. on Tuesday 22 November To assume hydrostatic equilibrium between the intracluster medium and the gravitational potential of galaxy clusters is an extensively used method to investigate their total masses. We want to test hydrostatic masses obtained with an observational code in the context of the SRG/eROSITA survey. We use the hydrostatic modeling code MBProj2 to fit surface-brightness profiles to simulated clusters with idealized properties as well as to a sample of 93 clusters taken from the Magneticum Pathfinder simulations. We investigate the latter under the assumption of idealized observational conditions and also for realistic eROSITA data quality. The comparison of the fitted cumulative total mass profiles and the true mass profiles provided by the simulations allows to gain knowledge about the reliability of our approach. Furthermore, we use the true profiles for gas density and pressure to compute hydrostatic mass profiles based on theory for every cluster. For an idealized cluster that was simulated to fulfill perfect hydrostatic equilibrium, we find that the cumulative total mass at the true $r_{500}$ and $r_{200}$ can be reproduced with deviations of less than 7%. For the clusters from the Magneticum Pathfinder simulations under idealized observational conditions, the median values of the fitted cumulative total masses at the true $r_{500}$ and $r_{200}$ are in agreement with our expectations, taking into account the hydrostatic mass bias. Nevertheless, we find a tendency towards a too high steepness of the cumulative total mass profiles in the outskirts. For realistic eROSITA data quality, this steepness problem intensifies for clusters with high redshifts and thus leads to too high cumulative total masses at $r_{200}$. For the hydrostatic masses based on the true profiles known from the simulations, we find a good agreement with our expectations concerning the hydrostatic mass. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12146v1

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Die Sanktionen gegen Russland nach der Invasion der Ukraine betreffen auch viele Forschungsprojekte. So hat die Max-Planck-Gesellschaft das Röntgenteleskop Erosita in einen Schlafmodus versetzt. Es ist 2019 als Teil des russischen Satelliten Spektrum-Röntgen-Gamma gestartet.Von Dirk Lorenzenwww.deutschlandfunk.de, SternzeitDirekter Link zur Audiodatei

Galaxienhaufen, Dunkle Energie, Supernovaüberreste und Neutronensterne: Auf der To-do-Liste des Weltraumteleskops eRosita stand nicht weniger als eine Kartierung des gesamten Himmels, als es 2019 ins All befördert wurde. Eine Himmelsdurchmusterung im Röntgenbereich hatte sich die Forschenden hinter der vornehmlich deutschen Mission vorgenommen, insgesamt acht Mal sollte eRosita den Himmel abtasten. Doch das ist bisher nicht gelungen: Denn eRosita ist auf einer russischen Plattform montiert. Ins All geschossen wurde das deutsche Teleskop von Russland. Und auch den Bodenkontakt hat bis Anfang März 2022 Russland übernommen… und was war dann? Franzi erzählt die Geschichte des Röntgenteleskops eRosita, das Jahrzehnte gebraucht hat, um überhaupt da zu sein, wo es heute ist, nämlich am Lagrange-Punkt L2. Und es ist eine Geschichte davon, dass ein Krieg auf der Erde auch im All seine Spuren hinterlässt.

Bentornati!Oggi parliamo dell'astronomia dei raggi X, un astronomia spesso dimenticata ma che può dirci molto sui fenomeni più energetici dell'Universo.Parliamo della storia dalle prime osservazioni, agli attuali telescopi, dando un piccolo sguardo al futuro e cosa ci aspetta con i futuri telescopi.- Mano della moglie di Rontgen da un articolo del Post: https://www.ilpost.it/2015/11/08/rontgen-raggi-x/-Nebulosa del Granchio vista con Chandra : https://chandra.harvard.edu/photo/2018/crab/ , https://www.nasa.gov/chandra/multimedia/chandra-15th-anniversary-crab-nebula.html-Vista della Via Lattea con eRosita :https://www.media.inaf.it/2020/06/19/il-cielo-x-come-non-lavete-mai-visto/Per seguirci sui nostri social :-Facebook: https://www.facebook.com/planetariodimodena-Instagram: https://www.instagram.com/planetariomodena/-Twitter: https://twitter.com/planetario_mo-Sito : https://www.planetariodimodena.it/Music Fanfare for Space by Kevin MacLeodLink: https://incompetech.filmmusic.io/song/3736-fanfare-for-spaceLicense: https://filmmusic.io/standard-license

Spaceflight news— More Russian fallout — Russia threatens OneWeb launch (spaceflightnow.com) — OneWeb looking to non-Russian rockets (spacenews.com) — eROSITA turned off on Russian Spektr-RG (space.com) — ExoMars likely to be delayed (spacenews.com) — South Korea worried about Russian launches (spacenews.com)Short & Sweet— Anahuac pleads guilty to selling tainted rocket fuel (justice.gov)— Iranian launch failure (apnews.com) — Post-recording, Iran successfully launched their second orbital payload. (reuters.com)— SpaceX awarded 3 more commercial crew missions (spacenews.com)Questions, comments, corrections— Andrew Z via email: More sanctions considerations— MMC in the chat: loss of ISS would free up money for the Moon.This Week in Spaceflight History— 13 March, 1985, Launch of Geosat (en.wikipedia.org) (PDF: jhuapl.edu) (earth.esa.in)— Next week (3/15 - 3/21) in 2003. Bringing fire to icy worlds.

Debra Werner of SpaceNews joins me to talk about Russia's ongoing invasion of Ukraine, the ways that it is affecting the space industry, how their last invasion had similar effects, and how the situation solidifies several arguments that have been made over the past decade or more.This episode of Main Engine Cut Off is brought to you by 40 executive producers—Simon, Lauren, Kris, Pat, Matt, Jorge, Ryan, Donald, Lee, Chris, Warren, Bob, Russell, Moritz, Joel, Jan, David, Joonas, Robb, Tim Dodd (the Everyday Astronaut!), Frank, Julian and Lars from Agile Space, Tommy, Matt, The Astrogators at SEE, Chris, Aegis Trade Law, Fred, Hemant, Dawn Aerospace, Andrew, and seven anonymous—and 730 other supporters.TopicsDebra Werner, Author at SpaceNewsDebra Werner (@spacereportr) / TwitterPrevious invasion of Ukraine had serious repercussions for the space sector - SpaceNewsEOS Data Analytics issues urgent plea for imagery of Ukraine - SpaceNewsRussian military convoy north of Kyiv stretches for 40 miles -Maxar | ReutersSmall satellite constellations promise resilient communications and Earth observation - SpaceNewsStatement on the status of the eROSITA instrument aboard Spektr-RG (SRG) | Max Planck Institute for extraterrestrial PhysicsRussia says it will no longer sell rocket engines to the United States - The VergeOneWeb leaves Baikonur Cosmodrome after Roscosmos ultimatum - SpaceNewsUkraine engineer talks testing SpaceX's new Starlink service - The VergeThe ShowLike the show? Support the show!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOListen to MECO HeadlinesJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterBuy shirts and Rocket Socks from the Main Engine Cut Off ShopMusic by Max JustusArtwork photo by NASA Wallops/Patrick Black

Es ist eines der großen Rätsel der Astronomie: Die “Fermi-Blasen” im Zentrum unserer Milchstraße. Eine Superblasen-Doppelstruktur im Zentrum der Milchstraße, erst vor elf Jahren vom gleichnamigen Gammateleskop der NASA entdeckt. Möglicherweise kann jetzt das neue Röntgenteleskop eRosita zur Aufklärung der galaktischen Super-Bubbles beitragen. Wie und warum sind diese Blasen aus schnellen Gasen und Gammastrahlen, die unglaubliche 50.000 Lichtjahre aus der Galaxie-Ebene herausragen, entstanden?

Seit zwei Jahren kreist das Röntgenteleskop eROSITA an Bord des russisch-deutschen Satelliten SRG um die Erde. Gleich bei der ersten von acht geplanten Himmelsdurchmusterungen entdeckte es einen glühenden Nebel, der vor rund zehntausend Jahren beim Ausbruch einer Supernova entstanden ist. Von Dirk Lorenzen www.deutschlandfunk.de, Sternzeit Hören bis: 19.01.2038 04:14 Direkter Link zur Audiodatei

Wenige Dinge sind so unbegreiflich wie das Universum. Nun ist das Unmögliche geschehen: Röntgenteleskop eRosita hat das gesamte Universum in einem einzigen Bild eingefangen. Für die Forschung eine Fundgrube mit schier unendlichen Möglichkeiten. Unter anderem lassen sich in den Gasnebel-Gebilden Spuren von Ereignissen nachspüren, die vor Millionen bis Milliarden von Jahren geschehen sind. Und das ist noch nicht alles: Verloren geglaubte baryonische Materie findet sich in eRositas Bild wieder. Es wird erst langsam klar, was für ein revolutionäres Werkzeug dieses Röntgenteleskop ist, und was sich alles in seiner Aufnahme des Universums verbirgt. Eines ist allerdings sicher: Forschende sind hier auf eine echte Goldader gestoßen. In Zukunft werden wir sicher noch viel von eRosita hören.

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Conjunción planetaria y ¿estrella de Belén? (min 5:00); Mitos sobre vacunas (25:00); ASKAP completa su primer cartografiado en radio del cielo (58:00); eROSITA descubre dos grandes burbujas desde el centro galáctico (1:15:00); Estrellas escapando de nuestra galaxia (1:39:00); Señales de los oyentes (2:06:00). En la foto, de arriba a abajo y de izquierda a derecha: Carlos González, Héctor Socas, Francis Villatoro, Ángel López-Sánchez. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Conjunción planetaria y ¿estrella de Belén? (min 5:00); Mitos sobre vacunas (25:00); ASKAP completa su primer cartografiado en radio del cielo (58:00); eROSITA descubre dos grandes burbujas desde el centro galáctico (1:15:00); Estrellas escapando de nuestra galaxia (1:39:00); Señales de los oyentes (2:06:00). En la foto, de arriba a abajo y de izquierda a derecha: Carlos González, Héctor Socas, Francis Villatoro, Ángel López-Sánchez. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

On connaissait les bulles de Fermi (on en parle ici depuis 2012), ces vastes étendues de plasma émettant des rayons gamma de part et d'autre du plan galactique, et bien il faudra compter désormais sur les bulles de eROSITA, des lobes encore plus étendus, englobant les bulles de Fermi et sans doute ayant la même origine au centre de notre Galaxie. L'étude est publiée dans Nature.

Vor gut einem Jahr startete in Baikonur das russisch-deutsche Weltraumobservatorium Spektr-RG zur Erkundung der energiereichen kosmischen Röntgen- und Gammastrahlung. Hauptinstrument ist das Röntgenteleskop eRosita, das den gesamten Himmel mit bislang unerreichter Genauigkeit beobachten soll. Von Hermann-Michael Hahn www.deutschlandfunk.de, Sternzeit Hören bis: 19.01.2038 04:14 Direkter Link zur Audiodatei

*** Suscribete a mi canal ***https://cutt.ly/ByNmfcgEn las noticias del misterio, Javier nos hablará de:-El universo energético de eRosita -El día que caían meteoritos pero nadie lo creía -Misión a Tritón, la extraña luna de Neptuno-Avistamiento Ovni en Japón -El experimento Xenón 1T*** Apoyanos ***https://cutt.ly/VujVpND*** Voz de la intro ***Xavi Villanueva. Web: https://abismofm.com Twitter: @abismofm Facebook: Abismo Producciones*** Voz en off ***Valeria Surcis twitter: @valeriasurcis @QuieroContarTuHblog: www.valeriasurcis.blogspot.comE-Mail: surcisvaleria@gmail.com*** Kela Carrasco ***Blog de Kela: https://raylossuenosprohibidos.blogspot.com/Canal de Youtube de Kela: https://www.youtube.com/channel/UCUKJBLjpY26KIGNymLR3u8AInstagram: @kela_carrasco_80*** Guión ***Eduar Pajaro Peña "Angel Yosniel"Web: produccionescarballes.comFacebook: https://www.facebook.com/A963852741NBInstagram: https://www.instagram.com/angelyosniel/E-Mail: angelyosniel@gmail.com*** Redes Sociales ***Twitter : @universoredFacebook: Misterioso universo en la red*** Correo Electrónico ***misteriosouniversored@gmail.com*** Unete al grupo de Telegram ***Grupo de Telegram: https://cutt.ly/DujBPxg*** Suscribete ***Apple Podcast: https://cutt.ly/CujVXTMSpotify: https://cutt.ly/EujV96TIvoox: https://cutt.ly/VujV64PSpreaker: https://cutt.ly/MujBoyU

Hace unos días salió una foto del unvierso entero en Rayos X tomada por eROSITA y es... hermosa. Este episodio nos acompaña un invitado fantástico, Juan Rafael Martinéz-Galarza del Centro de Astrofísica de Harvard & Smithsonian. Acá nos cuenta desde cómo funciona un telescopio de Rayos X, de cómo estos fotones tan energéticos nos han enseñado muchísimo del universo y hasta, por supuesto, la foto que nos dejó asombrados, eROSITA. Acá la foto para la que la vean junto a la explicación: http://cdn.sci-news.com/images/enlarge7/image_8555_2e-eROSITA-Map.jpg -Apóyanos en Patreon: www.patreon.com/shotsdeciencia -O apóyanos con una donación en www.ciencialegible.com/apoyanos Referencias y Recursos: Página de eROSITA: https://www.mpe.mpg.de/eROSITA Supernovas CHANDRA: https://chandra.harvard.edu/photo/2019/tycho/ https://www.nasa.gov/sites/default/files/thumbnails/image/casa_elements.jpg https://www.chandra.si.edu/photo/2015/g299/

eRosita - Röntgenteleskop sucht nach neuen Galaxien / Hyperloop - Münchner Studenten wollen halbe Schallgeschwindigkeit erreichen / Ebola-Epidemie - Warum sich die Lage im Kongo weiter verschlechtert.

Deutsche Astrophysiker wollen mit dem Röntgenteleskop eROSITA dunkle Energie im Weltraum nachweisen. Das Projekt startet voraussichtlich am Freitag mit einer russischen Trägerrakete vom Weltraumbahnhof Baikonur

Mit einem neuartigen Teleskop wollen Forscher in die Tiefen des Weltalls blicken, den Kosmos gleichsam kartografieren - und ein entscheidendes Rätsel lösen: Warum dehnt sich unser Universum eigentlich immer schneller aus?

Union und SPD einig bei Mobilfunk-Infrastrukturgesellschaft Die Spitzen der Koalitionsfraktionen haben sich auf wesentliche Schritte zur Verbesserung der Mobilfunkversorgung in Deutschland geeinigt. "Wir schaffen eine neue Mobilfunkinfrastrukturgesellschaft des Bundes für den Bau von Mobilfunkmasten in unversorgten Regionen", heißt es nach Informationen der dpa in einem Beschluss der Fraktionsspitzen von Union und SPD. In Zukunft soll der Bund mit der Infrastrukturgesellschaft dort eingreifen, wo der wirtschaftliche Ausbau nicht funktioniere und weiterhin weiße Flecken bestünden. Die neue Autozulassung im Netz Wer ein Auto anmelden möchte, sitzt oft lange in Warteräumen der Behörden. Doch mit diesem Ärger soll bald Schluss sein. Ab Herbst wird Phase drei des Projekts i-Kfz bundesweit eingeläutet, heißt es in einer Mitteilung von Verkehrsminister Andreas Scheuer. i-Kfz bedeutet internetbasierte Fahrzeugzulassung. Ein neues Auto soll man damit künftig online anmelden, umschreiben oder wiederzulassen können – ohne Wartezeit im Amt zu verbringen. Allerdings gilt dies nur für Fahrzeuge, die zum ersten Mal nach dem 1. Januar 2015 zugelassen worden sind. Mozilla macht "Firefox" zur Dachmarke Mozilla führt neue Designs für seinen Browser und verwandte Produkte ein. Im Zuge der Umstellung wird auch eine neue Dachmarke "Firefox" mit eigenem Logo eingeführt, die verschiedene Projekte Mozillas bündeln soll. So bekommen die Programme unter anderem gleiche Farbpaletten, eine neue einheitliche Schriftart für die Marke und auch stilistisch ähnliche Logos. Damit endet vorerst Mozillas Open-Design-Prozess, der sich über die letzten eineinhalb Jahre hinzog. Teleskop eRosita auf dem Weg ins All Mit Röntgenstrahlen den Kräften des Urknalls auf der Spur: Das deutsche Teleskop eRosita soll Forschern einen Blick auf die dunkle Energie des Universums ermöglichen. Am Ende soll eRosita eine Himmelskarte liefern, die das Universum und seine Entwicklung in bisher unerreichter Qualität abbildet. Am 21. Juni soll eine russische Rakete das Teleskop als Teil des Weltraumobservatoriums Spektrum-RG vom Weltraumbahnhof Baikonur ins All bringen. Forscher sprechen vom größten bilateralen russisch-deutschen Raumfahrtprojekt. Diese und weitere aktuelle Nachrichten finden Sie ausführlich auf heise.de

Das neue Weltraumteleskop eRosita soll den gesamten Himmel im Röntgenlicht beobachten. Wie sich das All in diesem Wellenlängenbereich darstellt und was die aufgenommenen Daten über die Vergangenheit des Universums verraten, erklärt Peter Predehl vom Max-Planck-Institut für extraterrestrische Physik in dieser Folge.

In dieser Folge spricht Jochen Weller von der Universitätssternwarte München über eine bislang unbekannte Energieform, die der Schwerkraft entgegenwirkt und die Expansion des Universums beschleunigt.

Active Galactic Nuclei (AGN) are the accreting super massive black hole (SMBH) at the center of massive galaxies. The tight M-σ and M_BH-M_bulge correlations reveal that the host galaxies are affected by the effects of the SMBHs. In addition, many works studying on the rest-frame color-magnitude relation have shown that AGN host galaxies have intermediate colors, which are considered as a transition from the blue cloud to red sequence in host-galaxy color evolution. Some works interpreted this result as an evidence for the AGN feedback, in the sense that the accretion process not only builds up the massive black holes, but also has a powerful influence on the surrounding environment, triggering or suppressing the star-forming activity in the host galaxy. These correlations make obvious the need to investigate AGN-host coevolution. One way to understand this coevolution is to study the AGN duty cycle (i.e., the time scale that the SMBH is active), which can be obtained by estimating AGN population among all the galaxies through cosmic times. Such demographic studies require a well-sampled census and accurate redshift information. In particular at high redshift, objects are extremely faint and sample numbers are very small. This could cause large statistical errors. For example, Aird et al. (2010) argued that luminosity-dependent density evolution with a flattening faint-end slope of the X-ray luminosity function (XLF) at z > 1.2 may result from catastrophic photo-z failures caused by observational limitations and improper templates used for photo-z computation. However, spectroscopic redshifts are time-consuming and difficult to be obtained for faint sources at high redshifts. Therefore we have to rely on photometric redshifts (photo-z) techniques which need to be tuned specifically to be reliable for AGNs (i.e., proper magnitude priors, appropriate AGN-galaxy hybrid template for SED-fitting, and correct multi-wavelength counterparts). In recent years, many deep and high-resolution observations become available in multiple wavebands, specially at near/mid-infrared. This allows us to reach higher redshift, and make more accurate analysis on the multi-wavelength properties of AGNs. In this thesis, we focus on the ECDFS area which comprise also the GOODS-S and CDFS regions. This is the portion of the sky with the deepest and most complete photometric information from X-ray to radio, including intermediate bands from the Subaru telescope, and optical/near-infrared data from the Hubble space telescope. To compute accurate photo-z using these data, first we combined multi-wavelength catalogs from UV to infrared after the astrometric calibration and correction for the different methods of flux extraction (e.g., total fluxes, flux apertures and PSF- fitted photometry). Second we identified the best multi-wavelength counterparts for X-ray sources from the 4Ms-CDFS and 250ks-ECDFS surveys, taking into account the positional errors and multiple magnitude distributions as priors simultaneously. We found that more then 96% of X-ray sources have multi-wavelength counterparts. Thirdly we built a new library of active galactic nuclei/galaxy hybrid templates appropriate for the faint X-ray population in the CDFS to simulate the AGN spectral energy distribution from low to high redshift. For X-ray-selected AGNs, we achieved a photo-z accuracy of 0.013 with an outliers fraction of 5.3%, while for non-X-ray galaxies, the photo-z accuracy is 0.010 with an outlier fraction of 4.6%. With the SED-fitting results of our well-trained AGN-galaxy hybrids, we further studied the galaxy and AGN host properties via the rest-frame color-magnitude diagram (CMD) which is an useful probe to trace the stellar populations. We made corrections for dust extinction and/or AGN contamination for the galaxy/AGN host colors in the CANDELS/GOODS-S region. We found that the AGN host colors also present bimodality in the CMD up to z~2.5 as found in normal galaxies, and the position of the blue peaks in the AGN samples are almost constant with cosmic time. This implies a weak connection between AGN activity and star formation in the host galaxy. For the X-ray sources in the 4Ms-CDFS survey, we found that for most of the sources, the correction for dust extinction is larger than the correction for the AGN contribution. This is because the AGN population in this field is dominated by low-luminosity AGNs which have host-dominated SEDs. However for few bright sources, their host colors are strongly effected by AGN contribution rather than by the dust extinction. For these sources, the correction for AGN contribution is about two times larger than the correction for dust extinction in general. Therefore AGN/galaxy decomposition becomes more important in a shallower and wider X-ray surveys, e.g., XMM-COSMOS and eROSITA, which contains a larger fraction of bright AGNs. Furthermore, with our accurate redshifts for galaxies and AGNs, we defined a high-redshift (high-z) sample using the redshift probability distribution function P(z) rather than relying on the best-fit value of photo-z. We integrated P(z) within a given redshift range to obtain the photo-z probability in that range and selected high-z sources above a given threshold. When computing the number of sources in a given redshift range, each source will not be counted as "1" but as the proportion of it. We compared this P(z) technique with traditional color techniques adopted for galaxy evolutionary stages, like the Lyman break galaxy and the BzK color-color selection via sample completeness and purity. We found that the P(z) technique is the most efficient and reliable method for selecting high-z sources. This is not surprising as it makes use of photometric information from the entire SED rather than using only three photometric points. Lastly, we built a high-z (z > 3) sources list for X-ray sources in ECDFS region, and compared our list with previous work. In our work, we made better X-ray-to-optical/NIR associations considering the positional errors and magnitude distribution. In addition, we obtained accurate photo-z using well-established AGN-galaxy hybrids for X-ray selected AGNs and applied P(z) for each source. These procedures help improving on our high-z sample selection.

Large X-ray surveys are a powerful tool to study the large-scale structure (LSS) of the Universe. The scientific impact of LSS studies using active galactic nuclei (AGN) in X-ray surveys can be significantly increased by conducting wider and deeper X-ray surveys and studying the surface brightness fluctuations of the unresolved cosmic X-ray background (CXB). In the first part of this Thesis, we have investigated the prospects of using the AGN sample to be detected by the upcoming eROSITA all-sky survey (eRASS) for LSS studies. We show that eRASS will detect about 3 million AGN in the 0.5-2.0 keV band. This will result in a ~30 times larger number of sources and a ~30 times better sensitivity than its 25 year old predecessor, the ROSAT all-sky survey (RASS). We show that this unprecedented AGN sample will have a median luminosity of ~10^44 erg/s, which is typical for the entire AGN population in this energy band. It will have a median redshift of z ~ 1 and approximately 40% of the objects will be in the redshift range of z = 1-2, where the bulk of the X-ray emission of AGN is produced. About 10^4 - 10^5 AGN are predicted to be beyond redshift z = 3 and about 2 000 - 30 000 beyond z = 4, which will potentially include some of the earliest AGN in the Universe. We demonstrate that, given these unique properties, the eRASS-AGN sample will be able to significantly improve our current knowledge of the AGN spatial density as a function of redshift and luminosity over a wide range of cosmic time. Further, we show that it will enable us, for the first time, to perform detailed redshift- and luminosity-resolved studies of the clustering strength of X-ray selected AGN. All these measurements will dramatically improve our understanding of the growth of supermassive black holes over cosmic time and its implications for galaxy evolution. We demonstrate for the first time that, given the breadth and depth of eRASS, it will be possible to use AGN as a cosmological probe via baryon acoustic oscillation (BAO) measurements. We will be able to convincingly detect BAOs in the currently uncharted redshift range of z ~ 1-2, which will improve the constraints on the current cosmological model. In the second part of this Thesis, we have conducted the most accurate measurement to date of the brightness fluctuations of the unresolved CXB in the 0.5-2.0 keV band for angular scales of < ~17'. For this we used the XBOOTES survey, the currently largest continuous survey of the X-ray telescope Chandra. We find that on small angular scales (< ~2') the observed power spectrum of the brightness fluctuations is broadly consistent with the conventional AGN clustering model, although with a 30% deviation. This deviation nevertheless presents a good opportunity to improve our understanding of clustering properties of unresolved AGN by testing more sophisticated clustering models with our measurement. For angular scales of > ~2' we measure a significant excess with up to an order of magnitude difference in comparison to the standard AGN clustering model. We demonstrate that an instrumental origin can be excluded. However, we also show that the excess can neither be explained with any known X-ray source population by looking at strength of its clustering signal and the shape of its energy spectrum. It might be caused by more than one type of source but the dominant source appears to have extragalactic origin. Finally, we make predictions on how eRASS will be able to advance the studies of the unresolved CXB.

Observational constraints on the average radial distribution profile of AGN in distant galaxy clusters can provide important clues on the triggering mechanisms of AGN activity in dense environments and are essential for a completeness evaluation of cluster selection techniques in the X-ray and mm wavebands. The aim of this work is a statistical study with XMM-Newton of the presence and distribution of X-ray AGN in the large-scale structure environments of 22 X-ray luminous galaxy clusters in the redshift range 0.9 < z less than or similar to 1.6 compiled by the XMM-Newton Distant Cluster Project (XDCP). To this end, the X-ray point source lists from detections in the soft band (0.35-2.4 keV) and full band (0.3-7.5 keV) were stacked in cluster-centric coordinates and compared to average background number counts extracted from three independent control fields in the same observations. A significant full-band (soft-band) excess of similar to 78 (67) X-ray point sources is found in the cluster fields within an angular distance of 8' (4 Mpc) at a statistical confidence level of 4.0 sigma (4.2 sigma), corresponding to an average number of detected excess AGN per cluster environment of 3.5 +/- 0.9 (3.0 +/- 0.7). The data point towards a rising radial profile in the cluster region (r < 1Mpc) of predominantly low-luminosity AGN with an average detected excess of about one point source per system, with a tentative preferred occurrence along the main cluster elongation axis. A second statistically significant overdensity of brighter soft-band-detected AGN is found at cluster-centric distances of 4'-6' (2-3 Mpc), corresponding to about three times the average cluster radius R-200 of the systems. If confirmed, these results would support the idea of two different physical triggering mechanisms of X-ray AGN activity in dependence of the radially changing large-scale structure environment of the distant clusters. For high-z cluster studies at lower spatial resolution with the upcoming eROSITA all-sky X-ray survey, the results suggest that cluster-associated X-ray AGN may impose a bias in the spectral analysis of high-z systems, while their detection and flux measurements in the soft band may not be significantly affected.

La tdores y la ley de Lindy (43:13) -El resultado de eRosita sobre S8 (1:10:28) -Señales de los oyentes (1:38:58) Este episodio es continuación de la Cara A. Contertulios: Héctor Socas, Francis Villatoro. Imagen de portada realizada con Midjo