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Thread: Dark matter around primordial black holes

  1. #1
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    Dark matter around primordial black holes

    https://arxiv.org/pdf/1003.3466.pdf

    Can someone please explain to me this paper's conclusion that dark matter halos would allow primordial black holes to be detected?

    I was under the impression that a) we don't know what dark matter is and b) we don't know what traces its annhilation would leave.

    And why would dark matter cluster around such a small region in the first place?
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  2. #2
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    Quote Originally Posted by parallaxicality View Post
    https://arxiv.org/pdf/1003.3466.pdf

    Can someone please explain to me this paper's conclusion that dark matter halos would allow primordial black holes to be detected?

    I was under the impression that a) we don't know what dark matter is and b) we don't know what traces its annhilation would leave.
    The paper is based on assumptions about a particular type of dark matter:
    We assume dark matter is ... consisting of WeaklyInteracting Massive Particles (WIMPs). We assume it may
    self-annihilate in the late Universe (i.e., there is no large
    WIMP-antiWIMP asymmetry), and that the final states are
    Standard Model particles
    And why would dark matter cluster around such a small region in the first place?
    You would need to read the referenced papers to work that out:
    "(Mack et al. 2007; Ricotti 2007; Ricotti et al. 2008; Ricotti & Gould 2009)"

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