Binary Black Hole Mergers from Globular Clusters: Implications for Advanced LIGO

Carl L. Rodriguez, Meagan Morscher, Bharath Pattabiraman, Sourav Chatterjee, Carl Johan Haster, Frederic A. Rasio

Research output: Contribution to journalArticlepeer-review

268 Scopus citations


The predicted rate of binary black hole mergers from galactic fields can vary over several orders of magnitude and is extremely sensitive to the assumptions of stellar evolution. But in dense stellar environments such as globular clusters, binary black holes form by well-understood gravitational interactions. In this Letter, we study the formation of black hole binaries in an extensive collection of realistic globular cluster models. By comparing these models to observed Milky Way and extragalactic globular clusters, we find that the mergers of dynamically formed binaries could be detected at a rate of ∼100 per year, potentially dominating the binary black hole merger rate. We also find that a majority of cluster-formed binaries are more massive than their field-formed counterparts, suggesting that Advanced LIGO could identify certain binaries as originating from dense stellar environments.

Original languageEnglish (US)
Article number051101
JournalPhysical review letters
Issue number5
StatePublished - Jul 30 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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