GW200105 and GW200115 are compatible with a scenario of primordial black hole binary coalescences

Abstract

Two gravitational wave events, i.e. GW200105 and GW200115, were observed by the Advanced LIGO and Virgo detectors recently. In this work, we show that they can be explained by a scenario of primordial black hole binaries that are formed in the early Universe. The merger rate predicted by such a scenario could be consistent with the one estimated from LIGO and Virgo, even if primordial black holes constitute a fraction of cold dark matter. The required abundance of primordial black holes is compatible with the existing upper limits from microlensing, caustic crossing and cosmic microwave background observations.

arXiv comment7 pages, 1 figure. To appear in EPJC

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• Formation of the First Two Black Hole-Neutron Star Mergers (GW200115 and GW200105) from Isolated Binary Evolution
• Primordial Black Hole Formation in a Dust Bouncing Model
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• Constraints on Population I/II neutron star-black hole binary formation by gravitational wave and radio observations
• Primordial Black Hole Mergers as Probes of Dark Matter in Galactic Center