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Title:Has JWST SOLVED the crisis in cosmology?!
Duration:23:44
Viewed:423,991
Published:11-04-2024
Source:Youtube

AD - Go to https://ground.news/drbecky to stay fully informed on Space and Science News. Subscribe through my link to get 40% off the Vantage plan for unlimited access this month only | Last weekend the lead researcher of a group using data from the James Webb Space Telescope (JWST) to calculate the current rate of expansion of the Universe (aka the Hubble constant, H0) presented their results for the first time at an American Physical Society meeting. What they announced was not at all what everyone was expecting... DISCLAIMER: None of this work is published yet. It has not been peer reviewed. Take everything with a large pinch of scientific salt. My previous videos on the "crisis in cosmology" - https://www.youtube.com/playlist?list=PLd19WvC9yqUf5TRqYoMYxEwjT6JIDW4Zn My video from earlier this year on the JWST result showing that overcrowding wasn't the problem - https://youtu.be/3NeKR7bqolY?t=1331 APS meeting schedule with Wendy Freedman’s talk - https://meetings.aps.org/Meeting/APR24/Session/S01.2 Hu & Wang (2023; list of new physics hypothesis beyond best model of the universe) - https://arxiv.org/pdf/2302.05709.pdf Riess et al. (2024; hubble tension not due to crowding problem) - https://arxiv.org/pdf/2401.04773.pdf DESI collaboration (2024; H(z) and H0 measurements) - https://arxiv.org/pdf/2404.03002.pdf Lee et al. (2023; JAGB stars as standard candles) - https://arxiv.org/pdf/2305.02453.pdf Bellazzini et al. (2004; TRBG stars as standard candles) - https://arxiv.org/pdf/astro-ph/0404572.pdf Planck collaboration (2018; latest best model of the Universe parameters) - https://arxiv.org/pdf/1807.06209.pdf Royal Society meeting with Wendy Freedman talk - https://royalsociety.org/science-events-and-lectures/2024/04/cosmological-model/ 00:00 Introduction 03:17 AD Ground News 04:54 What is the Hubble Tension (aka the "crisis in cosmology")? 07:40 The possible explanations/solutions for the Hubble tension? 14:22 What Freedman et al. are claiming to have found with JWST 18:32 How does this compare to previous work on this with JWST? 20:30 What now? Is the “crisis in cosmology” really over? 22:57 Bloopers Video filmed on a Sony ⍺7 IV --- 🎧 Royal Astronomical Society Podcast that I co-host: podfollow.com/supermassive --- 📚 My new book, "A Brief History of Black Holes", out NOW in paperback, e-book and audiobook (which I narrated myself!): http://lnk.to/DrBecky --- 📚 "The Year In Space" celebrating all things space in 2022 from me and the rest of the Supermassive Podcast team: https://geni.us/jNcrw --- 👕 My new merch, including JWST designs, are available here (with worldwide shipping!): https://dr-becky.teemill.com/ --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --- 👩🏽‍💻 I'm Dr. Becky Smethurst, an astrophysicist at the University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars. http://drbecky.uk.com https://rebeccasmethurst.co.uk



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