http://arxiv.org/abs/2301.02349
Nowadays, the existence of supermassive black holes (SMBHs) in the center of galactic halos is almost confirmed. It is expected that in case of adiabatic growth of SMBHs in the center of galactic halos, one can expect to form extremely dense regions known as dark-matter spikes around them. In this work, we calculate the merger rate of compact binaries in dark-matter spikes while considering halo models with spherical and ellipsoidal collapses. Our findings exhibit that ellipsoidal collapse dark matter halo models can potentially yield the enhancement of the merger rate of compact binaries. Finally, our results confirm that the merger rate of primordial black hole binaries is consistent with the results estimated by the LIGO Virgo detectors, while such results can not be realized for primordial black hole-neutron star binaries.
S. Fakhry, Z. Salehnia, A. Shirmohammadi, et. al.
Mon, 9 Jan 23
16/59
Comments: 13 pages; 5 figures; references added
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