Growth of Stellar-mass Black Holes in Dense Molecular Clouds and GW190521

Growth of Stellar-mass Black Holes in Dense Molecular Clouds and GW190521

A stellar-mass black hole can grow its mass noticeably through Bondi accretion, if it is embedded in an extremely dense and massive molecular cloud with slow motion with respect to the ambient medium for an extended period of time. This provides a novel, yet challenging channel for the formation of...

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Veröffentlicht in:The Astrophysical journal 2021-02, Vol.908 (1), p.59
Hauptverfasser: Rice, Jared R., Zhang, Bing
Format: Artikel
Sprache:eng
Schlagworte:
Accretion
Astrophysics
Binary stars
Black holes
Bondi accretion
Deposition
Gravitational waves
Molecular clouds
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Zhang, Bing
description A stellar-mass black hole can grow its mass noticeably through Bondi accretion, if it is embedded in an extremely dense and massive molecular cloud with slow motion with respect to the ambient medium for an extended period of time. This provides a novel, yet challenging channel for the formation of massive stellar-mass black holes. We discuss how this channel may account for the massive binary black hole merger system GW190521 as observed by LIGO/Virgo gravitational wave detectors as well as the claimed massive black hole candidate LB-1.
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subjects Accretion
Astrophysics
Binary stars
Black holes
Bondi accretion
Deposition
Gravitational waves
Molecular clouds
title Growth of Stellar-mass Black Holes in Dense Molecular Clouds and GW190521
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