Primordial black holes in light of LIGO/Virgo observations

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by Ville Vaskonen (IFAE)


Assuming that a fraction of dark matter is in primordial black holes (PBHs), a population of PBH binaries is formed before matter-radiation equality from large Poisson fluctuations in their spatial distribution. Though many of these binaries are disrupted by a nearby PBH or a small cluster of PBHs, a large fraction of them survives until they merge. In this talk I will show that the LIGO/Virgo observations give strong constraints on the abundance of O(10) solar mass PBHs and I will discuss the possibility that some of the observed GW events are from PBH mergers.


Organized by Cosimo Nigro, César Jesús-Valls, Jan Ollé


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