Interpreting LIGO/Virgo "Mass-Gap" events as lensed Neutron Star-Black Hole binaries

2020/06/24 by Broadhurst, Tom, Diego, Jose M., Smoot, George F.
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE)

paper · doi:10.48550/arxiv.2006.13219

Abstract

Gravitational lensing allows the detection of binary black holes (BBH) at cosmological distances with chirp masses that appear to be enhanced by 1+z in the range 195%), from which we infer a factor ≃ 5 higher intrinsic rate of NSBH events than BBH events, reflecting a higher proportion of neutron stars formed by early star formation. We predict a distinctive locus for lensed NSBH events in the observed binary mass plane, spanning 1

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