Gas depletion in primordial globular clusters due to accretion on to stellar-mass black holes

Nathan W.C. Leigh, Torsten Boeker, Thomas Maccarone, Hagai B. Perets

Research output: Contribution to journalArticle

Abstract

We consider the effect of compact stellar remnants on the interstellar medium of a massive star cluster following the initial burst of star formation. We argue that accretion on to stellar-mass black holes is an effective mechanism for rapid gas depletion in clusters of all masses, as long as they contain progenitor stars more massive than ≳50 Msun. This scenario appears especially attractive for the progenitor systems of present-day massive globular clusters which likely had masses above M ≳ 107 Msun. In such clusters, alternative mechanisms such as supernovae and stellar winds cannot provide a plausible explanation for the sudden removal of the primordial gas reservoir that is required to explain their complex chemical enrichment history. In order to consider different regimes in the rate of gas accretion on to stellar-mass black holes, we consider both the Bondi-Hoyle approximation as well as Eddington-limited accretion. For either model, our results show that the cluster gas can b
Original languageEnglish
Pages (from-to)2997-3006
JournalMonthly Notices of the Royal Astronomical Society
StatePublished - Mar 2013

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