Binary black hole growth by gas accretion in stellar clusters

Abstract

We show that binaries of stellar-mass black holes formed inside a young protoglobular cluster, can grow rapidly inside the cluster's core by accretion of the intracluster gas, before the gas may be depleted from the core. A black hole with mass of the order of eight solar masses can grow to values of the order of thirty five solar masses in accordance with recent gravitational waves signals observed by LIGO. Due to the black hole mass increase, a binary may also harden. The growth of binary black holes in a dense protoglobular cluster through mass accretion indicates a potentially important formation and hardening channel.

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Cited by in corpus (16)

• The Physics of Star Cluster Formation and Evolution
• Beyond the Standard Model Explanations of GW190521
• The Stellar Merger Scenario for Black Holes in the Pair-instability Gap
• The Evolution of Binaries in a Gaseous Medium: Three-Dimensional Simulations of Binary Bondi-Hoyle-Lyttleton Accretion
• Missing in Action: New Physics and the Black Hole Mass Gap
• Generation of massive stellar black holes by rapid gas accretion in primordial dense clusters
• Binary formation through gas-assisted capture and the implications for stellar, planetary and compact-object evolution
• Binary evolution, gravitational-wave mergers and explosive transients in multiple-populations gas-enriched globular-clusters
• Growth of stellar mass black holes in dense molecular clouds and GW190521
• Modified Gravity and the Black Hole Mass Gap
• Dark Black Holes in the Mass Gap
• Impact of ringdown higher-order modes on black-hole mergers in dense environments: the scalar field case, detectability and parameter biases
• Hypercritical accretion during common envelopes in triples leading to binary black holes in the pair-instability-supernova mass gap
• Black hole mass function shift in proto-stellar-clusters driven by gas accretion
• Compact objects formation, retention, and growth through accretion onto gas-embedded white-dwarfs/neutron-stars in gas-enriched globular-clusters
• Enhanced power of gravitational waves and rapid coalescence of black hole binaries through dark energy accretion