Monday, July 5, 2021

The Hubble Crisis

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Recorded: 2021/01/07 Released: 2021/07/05

Randy and Jim the differences between measurements in the Hubble constant and some proposals to resolve the issue.
------------------------------------------- Notes:

1. The papers we read for this program:
2. Related Episodes of Physics Frontiers:
3. Wendy Freedman recently published this article about the same topic, which some people say resolves the tension (It came out in the arXiv in June, we recorded in January, so it wasn't included). After going through it this weekend (7/17-18), I don't think it makes as strong a conclusion as the press made out, but it is worth reading, even at 48 pages. 4. Please visit and comment on our subreddit, YouTube Channel and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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4 comments:

  1. New paper explains that Cosmic background measurements are the most accurate and errors in measurement of Cepheid variables and red giants may be responsible for the apparent discrepancy. Here is the paper: https://arxiv.org/abs/2106.15656 (in prepublication) and here is a summary of it: https://cosmoquest.org/x/2021/07/new-research-may-bring-the-universe-into-cohesion/.

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    1. I read about that, although well after we recorded. I'm not sure what to think about it yet.

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  2. Hi Jim and Randy. Long time listener of the podcast and I wanted to extend my gratitude for the episodes. Undertaking a theoretical PhD in a department focused on the experimental side, these podcasts allow me to connect with areas I wouldn't usually be exposed to.

    I was wondering if you would consider doing an episode where we hear more about Jim and Randy's careers in physics: what motivates you to study, what research you have been a part of and how you have both stayed active during the pandemic.

    Thanks again and best,

    Jack.

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    1. Thanks, Jack! I don't think we'll be doing anything like that. There are occasional bits in the podcast where we talk about our pasts, but in general, we like to stick to papers, and we haven't been able to get our lives peer reviewed yet.

      I would like to assure you, though, that neither of us has any first-hand knowledge of the research that we talk about, or any financial interest in any of the theories...even in the physics betting markets.

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