http://arxiv.org/abs/1908.09752
We derive a lower bound on the merger rate of primordial black hole (PBH) binaries by estimating the maximal fraction of binaries that were disrupted between formation in the early universe and merger, and computing the merger rate of disrupted binaries. This implies robust constraints on the PBH abundance in the range $1-100 M_\odot$. We further show that LIGO/Virgo design sensitivity has the potential to reach the PBH mass range of $10^{-2}-10^3 M_\odot$. These constraints are stronger if PBH are initially spatially clustered.
V. Vaskonen and H. Veermäe
Tue, 27 Aug 19
3/85
Comments: 5 pages, 3 figures
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