Article (Scientific journals)
The population of merging compact binaries inferred using gravitational waves through GWTC-3
The LIGO Scientific Collaboration; the Virgo Collaboration; the KAGRA Collaboration et al.
2021In arXiv e-prints, p. 2111.03634
 

Files


Full Text
2111.03634.pdf
Publisher postprint (8.11 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
General Relativity and Quantum Cosmology
Abstract :
[en] We report on the population properties of 76 compact binary mergers detected with gravitational waves below a false alarm rate of 1 per year through GWTC-3. The catalog contains three classes of binary mergers: BBH, BNS, and NSBH mergers. We infer the BNS merger rate to be between 13 $\rm{Gpc^{-3} yr^{-1}}$ and 1900 $\rm{Gpc^{-3} yr^{-1}}$ and the NSBH merger rate to be between 7.4 $\rm{Gpc^{-3}\, yr^{-1}}$ and 320 $\rm{Gpc^{-3} yr^{-1}}$ , assuming a constant rate density versus comoving volume and taking the union of 90% credible intervals for methods used in this work. Accounting for the BBH merger rate to evolve with redshift, we find the BBH merger rate to be between 17.3 $\rm{Gpc^{-3}\, yr^{-1}}$ and 45 $\rm{Gpc^{-3}\, yr^{-1}}$ at a fiducial redshift (z=0.2). We obtain a broad neutron star mass distribution extending from $1.2^{+0.1}_{-0.2} M_\odot$ to $2.0^{+0.3}_{-0.2} M_\odot$. We can confidently identify a rapid decrease in merger rate versus component mass between neutron star-like masses and black-hole-like masses, but there is no evidence that the merger rate increases again before 10 $M_\odot$. We also find the BBH mass distribution has localized over- and under-densities relative to a power law distribution. While we continue to find the mass distribution of a binary's more massive component strongly decreases as a function of primary mass, we observe no evidence of a strongly suppressed merger rate above $\sim 60 M_\odot$. The rate of BBH mergers is observed to increase with redshift at a rate proportional to $(1+z)^{\kappa}$ with $\kappa = 2.7^{+1.8}_{-1.9}$ for $z\lesssim 1$. Observed black hole spins are small, with half of spin magnitudes below $\chi_i \simeq 0.26$. We observe evidence of negative aligned spins in the population, and an increase in spin magnitude for systems with more unequal mass ratio.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
The LIGO Scientific Collaboration
the Virgo Collaboration
the KAGRA Collaboration
Baltus, Grégory ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Boudart, Vincent ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Collette, Christophe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Active aerospace struct. and adv. mecha. systems
Cudell, Jean-René  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Fays, Maxime  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Language :
English
Title :
The population of merging compact binaries inferred using gravitational waves through GWTC-3
Publication date :
2021
Journal title :
arXiv e-prints
Pages :
arXiv:2111.03634
Available on ORBi :
since 18 January 2022

Statistics


Number of views
33 (0 by ULiège)
Number of downloads
70 (0 by ULiège)

Bibliography


Similar publications



Contact ORBi