Bayesian analysis of the spin distribution of LIGO/Virgo black holes

García-Bellido Capdevila, Juan; Nuño Siles, José Francisco; Ruiz Morales, Ester

UAM_Biblioteca

Author

García-Bellido Capdevila, Juan

; Nuño Siles, José Francisco

; Ruiz Morales, Ester

Entity

UAM. Departamento de Física Teórica

Publisher

Elsevier

Date

2021-01-01

Citation

Physics of the Dark Universe 31 (2021): 100791

ISSN

2212-6864 (online)

DOI

10.1016/j.dark.2021.100791

Funded by

JGB and ERM thank the Theory Division for their generous hospitality during their Sabbatical at CERN in 2018, when this work originated. The authors acknowledge support from the Research Project PGC2018-094773-B-C32 (MINECO-FEDER, Spain) and the Centro de Excelencia Severo Ochoa Program, Spain SEV-2016-0597

Project

Gobierno de España. PGC2018-094773-B-C32; Gobierno de España. SEV-2016-0597

Editor's Version

https://doi.org/10.1016/j.dark.2021.100791

Subjects

Black hole binaries; Gravitational waves; Spin; Física

URI

http://hdl.handle.net/10486/700588

Rights

Abstract

Gravitational wave detection from binary black hole (BBH) inspirals has become routine thanks to the LIGO/Virgo interferometers. The nature of these black holes remains uncertain. We study here the spin distributions of LIGO/Virgo black holes from the first catalog GWTC-1 and the first four published BBH events from run O3. We compute the Bayes evidence for several independent priors: flat, isotropic, spin-aligned and anti-aligned. We find strong evidence for low spins in all of the cases, and significant evidence for small isotropic spins versus any other distribution. When considered as a homogeneous population of black holes, these results give support to the idea that LIGO/Virgo black holes are primordial

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