Accreting Black Hole Binaries in Globular Clusters

作者：Kremer Kyle; Chatterjee Sourav; Rodriguez Carl L; Rasio Frederic A

来源：Astrophysical Journal, 2018, 852(1): 29.

DOI：10.3847/1538-4357/aa99df

<jats:title>Abstract</jats:title>
<jats:p>We explore the formation of mass-transferring binary systems containing black holes (BHs) within globular clusters (GC). We show that it is possible to form mass-transferring BH binaries with main sequence, giant, and white dwarf companions with a variety of orbital parameters in GCs spanning a large range in present-day properties. All mass-transferring BH binaries found in our models at late times are dynamically created. The BHs in these systems experienced a median of ∼30 dynamical encounters within the cluster before and after acquiring the donor. Furthermore, we show that the presence of mass-transferring BH systems has little correlation with the total number of BHs within the cluster at any time. This is because the net rate of formation of BH–non-BH binaries in a cluster is largely independent of the total number of retained BHs. Our results suggest that the detection of a mass-transferring BH binary in a GC does not necessarily indicate that the host cluster contains a large BH population.</jats:p>

• 出版日期2018-1-1