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Review of Evidence for Dark Matter

  1. Aug 19, 2012 #1

    marcus

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    There are several types of evidence for DM and Helsinki scientist Matts Roos provides a 39 page overview listing and summarizing each kind. It's a useful article. He gives graphic figures to illustrate each type of evidence.

    http://arxiv.org/abs/1208.3662
    Astrophysical and cosmological probes of dark matter
    Matts Roos
    (Submitted on 17 Aug 2012)
    Dark matter has been introduced to explain mass deficits noted at different astronomical scales, in galaxies, groups of galaxies, clusters, superclusters and even across the full horizon. Dark matter makes itself felt only through its gravitational effects. This review summarizes phenomenologically all the astrophysical and cosmological probes that have been used to give evidence for its existence.
    39 pages, 24 figures. Accepted by J. of Modern Physics and will be released as Special Issue in September, 2012

    The Bullet Cluster evidence, that everybody seems to know about, comes on page 28.
    People new to the subject of DM might benefit by at least leafing thru and glancing at the pictures.

    This review paper only covers the astrophysical and cosmological evidence. There are also several ongoing efforts to detect DM particles. Results from that work are preliminary and controversial--and were outside the scope of Roos's review.
     
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  3. Aug 19, 2012 #2

    nicksauce

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    This is a very useful article, thanks for posting. I often argue with people who think that rotation curves are the sole evidence for DM, so it will be nice to have this list handy.
     
  4. Aug 20, 2012 #3

    Bobbywhy

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    Thanks, marcus, for posting this valuable summary of evidence for Dark Matter. As much as I try to disallow DM with non-scientific emotion it is reassuring to regress back into the land of empirical evidence.

    Bobbywhy
     
  5. Aug 20, 2012 #4

    Drakkith

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    Excellent article. Thanks Marcus!
     
  6. Aug 21, 2012 #5

    bcrowell

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    Thanks, Marcus, very nice.

    I found it odd that the paper underplayed big bang nucleosynthesis so strongly. I would consider the relative abundances of hydrogen, helium, and deuterium to be the single strongest piece of evidence for nonbaryonic dark matter, and yet I can't find anything in the paper directly discussing it.

    BBN is also the only source of evidence I'm aware of that shows any serious problem with the current models, because of the lithium issue: arxiv.org/abs/0808.2818, arxiv.org/abs/1107.1117 . Has this been resolved since those papers were published?

    It's too bad that the direct detection experiments are such a mess of contradictory results. Since SUSY seems to be mortally wounded, it would be interesting to find out what dark matter really consists of.
     
    Last edited: Aug 21, 2012
  7. Aug 21, 2012 #6

    Chronos

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    This is the most recent 'solution' proposed for the lithium problem -
    Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem http://arxiv.org/abs/1208.0443
     
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