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SUMMARY:Determining the origin of LIGO's merging black holes - Christian B
 yrnes\, University of Sussex
DTSTART:20200219T141500Z
DTEND:20200219T151500Z
UID:TALK137611@talks.cam.ac.uk
CONTACT:Francesca Chadha-Day
DESCRIPTION:Although black holes can be the remnants of dead stars\, it is
  also possible that primordial black holes exist\, which formed long befor
 e stars. Such black holes are a dark matter candidate\, and they could als
 o explain some of the unexpected properties of the black hole mergers that
  LIGO has detected. I will summarise the evidence and challenges behind th
 is claim\, and then focus on how current and future data can be used to di
 scriminate between astrophysical and primordial black holes. Finally\, I w
 ill explain why the QCD transition during the early universe may lead to a
  large enhancement in the formation rate of primordial black holes with ma
 ss below the Chandrasekhar mass limit.
LOCATION:MR2\, Centre for Mathematical Sciences
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