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Dark matter properties detected using VLT

  1. Feb 27, 2006 #1

    Chronos

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    A recent study using the VLT array has measured the temperature and size of dark matter clumps. Interestingly enough, the study has not yet been submitted to Arxiv, but will probably appear within a week. It is expected to be one of the most important papers in 2006. Here is a teaser:

    Dark matter comes out of the cold
    http://news.bbc.co.uk/2/hi/science/nature/4679220.stm
     
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  3. Feb 27, 2006 #2

    marcus

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    We talked about that BBC article "Dark matter comes out of the cold" in another PF thread started 2 or 3 weeks ago
    https://www.physicsforums.com/showthread.php?t=109870

    About Arxiv, I think the study may already have been submitted to Arxiv actually.
    Gilmore is one of the authors

    http://arxiv.org/abs/astro-ph/0602186

    this was posted on Arxiv around 8 February which was about the same time that the "out of the cold" BBC article quoting Gilmore was posted.

    I have a vague memory of discussing this with Spacetiger, a couple of weeks ago, and maybe you also were in that thread. It was about the BBC article you mention.

    The thing was they inferred that the DM particles were going around 9 kilometers per second, because they didnt find clouds smaller than a certain size, and the size of the clouds was inferred from the clumps of VISIBLE matter-----the dwarf galaxies

    dont completely remember, may be mistaken
     
    Last edited: Feb 27, 2006
  4. Feb 27, 2006 #3

    marcus

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    Some interesting points came up in that earlier discussion of the BBC article you mentioned

    You may recall it now. This is how it started----topic was 'temperature of DM'
    https://www.physicsforums.com/showthread.php?t=109870

    Spacetiger had some things to say, I think you also commented, and several other people
     
    Last edited: Feb 27, 2006
  5. Feb 27, 2006 #4

    Chronos

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    Oops. I need to replace my memory chips.
     
  6. Feb 28, 2006 #5

    marcus

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    when you find a supplier, let me know----I could use some too:smile:
     
  7. Mar 2, 2006 #6

    Chronos

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    I'm too excited to sleep until I see the paper . . . zzzzzz.
     
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