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2 episodes with Katherine Freese
Katherine Freese is a German-born American theoretical astrophysicist. She is a professor of physics at the University of Texas at Austin. She is known for her work in theoretical cosmology at the interface of particle physics and astrophysics.In this episode, Katherine discusses the journey of the sun through the Milky Way, the impending merger with the Andromeda galaxy, and the vastness of the universe, possibility of life "out there," and the origins of the universe.Grab your copy of The Time is Now and start your journey toward living a more intentional and fulfilling life - https://a.co/d/aDYCQ9oJoin this channel to get access to exclusive perks:https://www.youtube.com/channel/UCl67XqJVdVtBqiCWahS776g/joinChapters00:00 Exploring the Cosmos: The Sun's Journey03:47 Galactic Mergers: The Milky Way and Andromeda06:53 The Vastness of the Universe: Understanding Scale and Time10:19 The Big Bang: Origins of the Universe20:34 Dark Matter and Dark Energy: The Invisible Universe30:10 Wormholes and the Fabric of Space-Time33:05 Theoretical Constructs of Black Holes34:51 Candidates for Dark Matter: WIMPs and Axions37:15 Detecting Dark Matter: Challenges and Experiments40:17 The Dark Matter and Dark Energy Dichotomy44:50 The Future of the Universe: Big Rip vs. Big Chill49:01 The Concept of Dark Stars54:24 The Search for Extraterrestrial Life// Connect With Me //ORDER MY BOOK, THE TIME IS NOW: A GUIDE TO HONOR YOUR TIME ON EARTH: https://www.timeisnowbook.comWebsite: https://throughconversations.comSubstack - https://throughconversations.substack.comYouTube community -https://www.youtube.com/channel/UCl67XqJVdVtBqiCWahS776g/join// Social //X: https://x.com/ThruConvPodcastInstagram: https://www.instagram.com/thruconvpodcast/?hl=enYouTube: https://www.youtube.com/channel/UCl67XqJVdVtBqiCWahS776g
Did JWST discover dark stars? Neil deGrasse Tyson and comedian Chuck Nice explore the dark universe and how learning about dark matter could help uncover the mystery of JWST's primordial objects with theoretical physicist Katherine Freese.NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/uncovering-dark-matter-mysteries-with-katherine-freese/Thanks to our Patrons Shara McAlister, Foohawt, Donna Palmieri, Trooj, Leroy Gutierrez, Tricia Livingston, Christina, Chris Ocampo, Eric Stellpflug, and John Potanos for supporting us this week.
Katherine Freese first presented the concept of dark stars at a conference in 2007. It was not well received at the time, as there was no evidence for it, and finding it seemed impossible. That is until recently… Katherine Freese is a renowned theoretical physicist, professor of physics at the University of Texas at Austin, and a member of the Simons Observatory. She works on a wide range of topics in theoretical cosmology and astroparticle physics, including her quest to identify the dark matter and dark energy that permeate the universe. She wrote The Cosmic Cocktail: Three Parts Dark Matter, published in June 2014 by Princeton University Press. She is one of the most renowned scientists that exists today, and I'm excited to have her back on the show to discuss Hubble tension, natural inflation, dark energy, and, of course, the star of the show (pun intended), dark stars! Tune in. Key Takeaways: Intro (00:00) In honor of Steven Weinberg (01:09) Katie's take on Hubble tension (03:28) Natural inflation and the particle responsible for it (08:43) Katie's take on dark energy (16:25) Philosophical and theological implications of Katie's research (21:11) Katie's philosophy as an educator (22:58) Katie presents her proof of dark stars (29:29) Pedagogical expectations (43:10) Outro (48:04) — Additional resources:
En 2007, Katherine Freese (université du Texas) et ses collaborateurs de l'époque avaient proposé le concept d' « étoiles sombres » (dark stars), qui auraient pu être la première phase de l'évolution stellaire dans l'histoire de l'univers, des « étoiles » alimentées par le chauffage induit par la matière noire plutôt que par la fusion nucléaire. Freese et d'autres collaborateurs montrent aujourd'hui que trois objets lointains vus par le télescope Webb pourraient ne pas être des galaxies, mais ce nouveau type d'objets… Ils publient leur étude dans Proceedings of the National Academy of Sciences.
Neutrino point source searches for dark matter spikes by Katherine Freese et al. on Sunday 11 September Any dark matter spikes surrounding black holes in our Galaxy are sites of significant dark matter annihilation, leading to a potentially detectable neutrino signal. In this paper we examine $10-10^5 M_odot$ black holes associated with dark matter spikes that formed in early minihalos and still exist in our Milky Way Galaxy today, in light of neutrino data from the ANTARES and IceCube detectors. In various regions of the sky, we determine the minimum distance away from the solar system that a dark matter spike must be in order to have not been detected as a neutrino point source for a variety of representative dark matter annihilation channels. Given these constraints on the distribution of dark matter spikes in the Galaxy, we place significant limits on the formation of the first generation of stars in early minihalos -- stronger than previous limits from gamma-ray searches in Fermi Gamma-Ray Space Telescope data. The larger black holes considered in this paper may arise as the remnants of Dark Stars after the dark matter fuel is exhausted; thus neutrino observations may be used to constrain the properties of Dark Stars. The limits are particularly strong for heavier WIMPs. For WIMP masses $sim 5 ,$TeV, we show that $lesssim 10 %$ of minihalos can host first stars that collapse into BHs larger than $10^3 M_odot$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2202.01126v3
Katherine Freese is a theoretical astrophysicist. She is currently a professor of physics at the University of Texas at Austin, where she holds the Jeff and Gail Kodosky Endowed Chair in Physics. She works on a wide range of topics in theoretical cosmology and astroparticle physics. She is the author of the book The Cosmic Cocktail: Three Parts Dark Matter, published in June 2014 by Princeton University Press.
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On this episode, Dave, Jami, Joel and Tony celebrate our space-themed summer reading program by reading books about science, including The Demon-Haunted World by Carl Sagan, The Cosmic Cocktail by Katherine Freese, Brief Answers To The Big Questions by Stephen Hawking, and Undeniable by Bill Nye.
This week - the mysterious stuff that's passing through you right now, and it literally holds the galaxy together... but we have no idea what it is. We talk to the scientists trying to find out. Plus in the news, the 100 year old technology that's helping us fight infections we can't currently treat. And evidence that wasps can size things up... Like this podcast? Please help us by supporting the Naked Scientists
More at https://www.philosophytalk.org/shows/big-bang-before-and-after. The Big Bang theory is the prevailing theory about the “birth” of the universe. It posits a singularity, or super high density state from which the entire universe expanded and continues to expand. But what exactly is the Big Bang, and what’s the evidence that it took place? How do we account for the “Big Bang state”? Was there something before the Big Bang? What does the theory posit about the future of the universe? And what role does philosophy play in answering these mysteries? John and Ken have a singular conversation with Katherine Freese from the University of Michigan, author of "The Cosmic Cocktail: Three Parts Dark Matter."
This week - the mysterious stuff that's passing through you right now, and it literally holds the galaxy together... but we have no idea what it is. We talk to the scientists trying to find out. Plus in the news, the 100 year old technology that's helping us fight infections we can't currently treat. And evidence that wasps can size things up... Like this podcast? Please help us by supporting the Naked Scientists
More at http://philosophytalk.org/shows/big-bang-before-and-after. The Big Bang theory is the prevailing theory about the “birth” of the universe. It posits a singularity, or super high density state from which the entire universe expanded and continues to expand. But what exactly is the Big Bang, and what's the evidence that it took place? How do we account for the “Big Bang state”? Was there something before the Big Bang? What does the theory posit about the future of the universe? And what role does philosophy play in answering these mysteries? John and Ken have a singular conversation with Katherine Freese from the University of Michigan, author of "The Cosmic Cocktail: Three Parts Dark Matter."
What is the universe made of? What is 'dark matter'? Why is the universe still expanding? These are just some of the questions astrophysicist Professor Katherine Freese tackles in this wonderfully accessible interview with Pod Academy's Craig Barfoot. Katherine Freese, is the George Eugene Uhlenbeck Collegiate Professor of Physics at the University of Michigan and author of The Cosmic Cocktail: Three parts dark matter, the inside story of the epic quest to solve one of the most compelling enigmas of modern science—what is the universe made of? The ordinary atoms that make up the known universe—from our bodies and the air we breathe to the planets and stars—constitute only 5 percent of all matter and energy in the cosmos. The rest is known as dark matter and dark energy, because their precise identities are unknown. Prof Freese explains that new galaxies come about when dark matter clumps together, indeed it is dark matter that dominates structure formation rather than atoms. However, we are not sure what dark matter actually is (though the favourite candidate is WIMPS (weakly interactive massive particles)) Prof Freese is one of the world's leading astrophycists, but this is an interview that the layperson can enjoy. For example, she talks of telescopes as 'time machines' - light takes 10 minutes to reach us from the sun, but the further out into space we look, towards distant galaxies, the further back in time was the light emitted, maybe even a million years ago. 'My secret mission is to encourage young people, especially young women, to become scientists', says Katherine Freese, 'When people talk about creativity, they think about the arts - but it is scientists who are in the sweet spot here'. The New Scientist magazine said of The Cosmic Cocktail: Physicist Katherine Freese drinks deep of her life's adventures and cosmic mysteries alike in her captivatingly frank book The Cosmic Cocktail
Did you know that 95% of the known universe is made up of stuff that we can neither see nor measure directly? Cara sits down with theoretical physicist Dr. Katherine Freese to talk about her new book, "The Cosmic Cocktail: Three Parts Dark Matter." Follow Katherine: @ktfreese.
Did you know that 95% of the known universe is made up of stuff that we can neither see nor measure directly? Cara sits down with theoretical physicist Dr. Katherine Freese to talk about her new book, "The Cosmic Cocktail: Three Parts Dark Matter." Follow Katherine: @ktfreese.
Dr. Katherine Freese George E. Uhlenbeck Professor of PhysicsUniversity of Michigan AuthorThe Cosmic Cocktail Cosmic Cocktail: Three Parts Dark Matter Dr. Katherine Freese, a pioneer in the study of dark matter, discusses her book, "The Cosmic Cocktail," which documents the inside story of the epic quest to solve one of the most compelling mysteries of modern science – what is the universe made of?
Physicists tell us that the normal matter is not the majority of the matter that exists. On this episode, Dr. Katherine Freese discusses the mysterious nature of dark matter and dark energy.
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