[ExI] Has the mystery of Dark Matter been solved?
johnkclark at gmail.com
Fri May 27 20:11:49 UTC 2016
Ethan Siegel discusses why black holes = dark matter is unlikely.
> All told, observations of
> the lack of Hawking radiation,
> gamma-ray-burst microlensing,
> neutron star capture in globular clusters,
> traditional microlensing,
> and the cosmic infrared and microwave backgrounds,
> tell us that we can’t have primordial black holes make up the majority
> of dark matter over a wide variety of mass ranges.
all those things do rule out Black Holes being Dark Matter over a
wide variety of mass ranges
but not over all mass ranges. To be Dark Matter Black Holes can't be
smaller than 10 solar masses and they can't be larger than 100. But LIGO
found a 29, a 36, and a 62 solar mass Black Hole almost as soon as it was
John K Clark
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