CosmoPhys

Primarily About Cosmology and Astrophysics

New Location – This blog is no longer maintained here.

The cosmology researcher talks database app is a continuing work-in-progress on a collection that currently lists thousands of online talks by cosmology researchers intended for an audience of other researchers working in the field. The data is gathered from diverse sources (called 'series') that host talks from conferences, seminars, workshops, course lectures, summer schools, colloquia, etc.

This collection was started out of personal interest as a service to the cosmology community because no one site was found that comprehensively compiles such data from a wide range of sources. There are many sources available so this represents only a fraction of the total that's out there; still, it's a starter attempt to extend beyond what's otherwise available in one place.

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New Location – This post is no longer maintained here and has been expanded and moved to this new location.

New Location – This list is now available at this new location.

New Location – This post is no longer maintained here and has been expanded and moved to this new location.

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New Location – This post is no longer maintained here and has been expanded and moved to this new location.

This is a simple list referencing examples of the work that I find interesting by some current early career physicists (primarily in cosmology and astroparticle physics). I may expand it later with more comments, but here it is for now:

Cosmologist Sunny Vagnozzi reviews 3 papers per week on cosmology and astroparticle physics on his blog. His PhD thesis, Cosmological searches for the neutrino mass scale and mass ordering, was selected for a Springer Thesis Award as one of the best PhD theses of 2019 and will be re-published as a book in the Springer Theses collection. He is active on twitter. Here is a list of video links to talks he presented at various conferences, seminars, etc. A talks page on his website includes talk slides in addition to video links. A one-page listing of all the papers he's reviewed on his blog is here along with topic tags links.

Marius Millea, @cosmic_mar on twitter, is currently a BCCP Fellow at Berkeley Center for Cosmological Physics. He is a member of the Planck and South Pole Telescope collaborations and an advocate for the Julia programming language (e.g., see CMSLensing.jl along with his other Julia github repositories). In 2019, he teamed up with his former thesis advisor Lloyd Knox to write the widely known paper in the field, The Hubble Hunter's Guide. Another impactful paper relating to the Hubble tension problem that he was an author on is Sounds Discordant: Classical Distance Ladder & ΛCDM-based Determinations of the Cosmological Sound Horizon. A more recent paper is about his work in developing a new CMB lensing analysis tool, Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data. The video of a talk he presented at the Perimeter Institute about it is here. His full publication list is here and this is a list of video links to other talks he has given.

Deanna C. Hooper is currently a postdoc researcher at the University of Helsinki. One of her recent papers is [1910.04619] The synergy between CMB spectral distortions and anisotropies, which she summarized in a 20-tweet thread. More info and a link to her other papers here. She also has recorded a series of general talks about the universe on happs.tv and earlier on pscp.tv. In April 2020, she gave an interview presentation in the Cosmology Talk series on the topic: CMB spectral distortions are a prime untapped resource, based on the 1910.04619 paper.

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New Location – This post is no longer maintained here and has been moved to this new location.

Joe Polchinski: Memories of a Theoretical Physicist [arxiv:1708.09093] | Tribute on reddit | Wikipedia bio | AIP Oral History Interview | His memoir is a marvelous read. Not only was he a great physicist of this modern era, Joe was an exceptionally kind and considerate person. Especially note the anecdote told by Robert McNees in the reddit tribute. See footnotes 1 – 3 for other tributes. A Dec. 2018 KITP symposium was held with talks on areas strongly impacted by his work.

John Archibald Wheeler: A Biographical Memoir by Kip Thorne [arxiv:1901.06623] | reddit post | Wikipedia bio | AIP Oral History Interviews | Web of Stories interview videos | I always love reading the little human interest anecdotes from the lives of physicists. Two quick examples: (1) Kip characterizes Wheeler as “unfailingly polite”, with the one exception he knows about being a sharp, cutting retort that Wheeler once made to Richard Feynman (page 4 of the memoir), and (2) the humorous anecdote about how Kip addressed him as a graduate student until a comment came from Wheeler's wife (bottom of page 2 and top of page 3 of the memoir).

Dennis Sciama: AIP Oral Histories Interview | reddit post | Wikipedia bio | It was interesting to hear about Sciama's experiences getting into cosmology at an early time when it was “not considered a respectable part of physics...my being a cosmologist must have made many people feel I was very much on the sidelines if not an actual crank.” There is a marvelous and very humorous anecdote about his meeting with Einstein in the AIP Oral Histories interview, which I highlight in the reddit post, along with some other interesting items. Also, his doctoral students included Stephen Hawking and Martin Rees. Highly recommended first-person narrative on a part of the early history of cosmology.

Jim Peebles: A one-hour+ talk titled My Life in Physical Cosmology, presented on 13-Dec-2019 while visiting the Oskar Klein Centre and the Department of Physics at Stockholm University shortly after being awarded the Nobel Prize in physics for his theoretical discoveries in physical cosmology.

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Two sets of White Paper submissions, Science and APC1, are available in response to the Astro2020 Decadal Survey. CSV files of info on them are available at that site. I took those source files and created searchable HTML pages with links to the PDF files for each paper. What's searchable is the paper title, the principal author and their institution, a short description of the paper, and (for the Science White Papers) the NASA ADS Bibcode record. The ADS data was extracted from an AAS Bulletin.

Each of the two searchable webpages has a link to the other, as well as to the source data. The webpages are self-contained with all the data included in the html file, which contains the javascript code for the searches and the CSS for styling.

The original purpose in doing this was because many of the submissions were not on the arXiv, and I wanted to see what else was available and also so the PDF file link were all on one page. In addition, though, the search feature has been very useful.

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This online-only conference featured 5 days of talks by cosmologists from 22-Jun-2020 to 26-Jun-2020. For anyone interested in the H0 tension problem, this is an excellent and highly recommended resource. Here are links to key resource information covering the conference.

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A KITP-UCSB program running from Jan 6 to Mar 13, 2020 is an excellent resource for topics related to primordial universe cosmology (e.g., inflation, reheating (aka the Hot Big Bang), baryogenesis, non-gaussianity, dark sectors, cosmological sources of gravitational waves, Hubble tension, etc). The program agenda with links to videos and slides is here.

I'd like to point out an excellent overview talk from this program by Raphael Flauger on Feb. 28 that reviews Hubble measurement physics and results from each of the major determination methods and discusses current status on Hubble tension. The video for Flauger's talk is here. That page does not have the talk slides (at least not yet anyway) but the slides are available in PDF format here. Update: the slides are also now available on the KITP video page. Here is a PDF of the slides.

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