Black Holes merging with Low Mass Gap Objects inside Globular Clusters

Abstract: Recently, the LIGO-Virgo collaborations have reported the coalescence of a binary involving a black hole and a low-mass gap object (LMGO) with mass in the range $\sim 2.5−5M_\odot$. In this work we study the dynamical formation of compact object pairs, via multiple binary-single exchanges that occur at the cores of globular clusters. We find that the exchanges are efficient in forming hard compact object binaries at the cores of dense astrophysical stellar environments. Furthermore, if the population size of the LMGOs is related to that of neutron stars, the inferred merger rate density of black hole-LMGO binaries inside globular clusters in the local Universe is estimated to be about $0.1\textrm{Gpc}^{−3}\textrm{yr}^{−1}$.

general relativity and quantum cosmologyHEP - latticeHEP - phenomenologyHEP - theorymathematical physics

Audience: researchers in the topic

High Energy Theory, Gravity and Cosmology Seminars @ NTUA