SIMBAD references

2024MNRAS.531.4725K - Mon. Not. R. Astron. Soc., 531, 4725-4733 (2024/July-2)

Mass ratio of binary black holes determined from LIGO/Virgo data restricted to small false alarm rate.

KINUGAWA T., NAKAMURA T. and NAKANO H.

Abstract (from CDS):

We focus on gravitational wave events of binary black hole mergers up to the third observing run with the minimum false alarm rate smaller than $10^{-5}\, {\rm yr}^{-1}$. These events tell us that the mass ratio of two black holes follows $m_2/m_1=0.723$ with the chance probability of 0.00301 per cent for the chirp mass $M_{\rm chirp}\,\gt 18\, {\rm M}_{\odot }$. We show that the relation of $m_2/m_1=0.723$ is consistent with the binaries originated from population III stars which are the first stars in the Universe. On the other hand, it is found for $M_{\rm chirp}\,\lt\, 18 \,{\rm M}_{\odot }$ that the mass ratio follows $m_2/m_1=0.601$ with the chance probability of 0.117 per cent if we ignore GW190412 with $m_2/m_1\sim 0.32$. This suggests a different origin from that for $M_{\rm chirp}\ \gt\ 18 \,{\rm M}_{\odot }$.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): gravitational waves - stars: population III - black hole mergers

Simbad objects: 36

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