Gravitational waves from primordial black holes collisions in binary systems

Abstract

It was shown by (Nakamura et al. 1997), (Ioka et al. 1998), and (Sasaki et al. 2016) that primordial black holes (PBHs) binaries can form effectively at the cosmological stage of radiation dominance, and the merge of the PBHs in pairs can explain the gravitational wave burst GW150914. In this paper, the model is re-examined by considering the effect of inflationary dark matter density perturbations which produce additional tidal forces. As a result, the merge rate of PBHs binaries and the corresponding rate of the gravitational bursts are suppressed by the factor $\sim 1.5-2$ in comparison with previous calculations. This rate matches the LIGO data if the PBHs constitute the $f\sim 5\times 10^{-4}-5\times 10^{-3}$ fraction of dark matter.

6 pages, 2 figures, Presented at the Conference on Physical Interpretation of Relativity Theory (PIRT-2017), Moscow, Russia

References in corpus (5)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• The first gravitational-wave source from the isolated evolution of two 40-100 Msun stars
• Astrophysical Implications of the Binary Black-Hole Merger GW150914
• Collapse of rotating stars in the Universe and the cosmic gamma ray bursts
• Gravitational Wave Bursts from Collisions of Primordial Black Holes in Clusters

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