Science Friday Tomorrow

By Sean Carroll | June 7, 2012 7:06 pm

Tomorrow (Friday, that is, in case it needed specifying) I’ll be on Science Friday as part of a discussion of dark matter vs. modified gravity, as well as NASA’s new gifts from the spymasters. I think most places SciFri is at 3:00 Eastern/Noon Pacific, and my little segment is scheduled for 20-minutes-past-ish.

Live radio! Anything can happen, really.

Also, I’m embarking on a new campaign to get more content on the blog by turning things I tend to simply Tweet into tiny blogposts. For example.

CATEGORIZED UNDER: Personal, Science
  • Physicalist

    Those of us who don’t do the twitter are grateful. See you (or hear you) tomorrow.

  • James Salsman

    Since NuSTAR will be launching in less than four days when you go on the air, I thought I would provide a selection of black hole dark matter papers in hopes they might result in a fair mention in between the unobserved, inexplicable, and increasingly less likely WIMPs, and the unfalsifiable, anti-Copernican and -cosmological principle MONDs.

    http://arxiv.org/pdf/0910.1152v1.pdf — Frampton and Ludwick’s 2009 basic 100,000 solar mass peak calculation for primordial IMBHs.

    http://iopscience.iop.org/2041-8205/720/1/L67/pdf/2041-8205_720_1_L67.pdf — Lacki and Beacom’s 2010 “Almost All Or Almost Nothing” paper indicating that almost all of the WIMPs would have fallen into black holes if there are more than a very small number of them.

    http://arxiv.org/pdf/1205.4012v1.pdf a very new paper explaining the conditions under which primordial black holes are allowed by nucleosynthesis element ratios; basically if inflation didn’t happen at a constant rate.

    http://arxiv.org/pdf/1204.3619v2.pdf another very recent paper showing “new pathways to PBH dark matter candidacy” using reduced dimensional analyses.

    Now get on the air and fight for the primacy of empirical observation!

  • James Salsman

    Two more:

    http://www.sciencedirect.com/science/article/pii/S0920563210001003 — Frampton’s 2010 explanation of why 100,000 solar mass dark matter IMBHs are consistent with the orbits of wide binaries, microlensing, and galactic disk stability. (WIMPs still struggle with the cuspy halos, not to mention dwarf galaxies.)

    http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2006.10801.x/abstract — Lodato and Natarajan’s 2006 theory of supermassive black hole formation which one of the commenters on your earlier post you link to above cited in opposition to the existence of IMBHs, but which actually describes the production of 100,000 solar mass black holes.

  • Navneeth

    “tiny blogposts”

    Please use the freshly minted term ‘bloglets’ henceforth.

  • Gizelle Janine

    Oh what an awesome idea. Gotta take that one from you. :D

  • James Salsman

    Oops, NuSTAR launches in less than five days, not four, sorry. Countdown clock: http://www.nasa.gov/mission_pages/nustar/main/index.html

  • Shantanu

    Can someone point me to an audio link of this discussion, if available?
    Many thanks

  • James Salsman
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Cosmic Variance

Random samplings from a universe of ideas.

About Sean Carroll

Sean Carroll is a Senior Research Associate in the Department of Physics at the California Institute of Technology. His research interests include theoretical aspects of cosmology, field theory, and gravitation. His most recent book is The Particle at the End of the Universe, about the Large Hadron Collider and the search for the Higgs boson. Here are some of his favorite blog posts, home page, and email: carroll [at] cosmicvariance.com .

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