We explore the formation of double-compact-object binaries in Milky Way (MW) globular clusters (GCs) that may be detectable by the Laser Interferometer Space Antenna (LISA). We use a set of 137 fully evolved GC models that, overall, effectively match the properties of the observed GCs in the MW. We estimate that, in total, the MW GCs contain ∼21 sources that will be detectable by LISA. These detectable sources contain all combinations of black hole (BH), neutron star, and white dwarf components. We predict ∼7 of these sources will be BH-BH binaries. Furthermore, we show that some of these BH-BH binaries can have signal-to-noise ratios large enough to be detectable at the distance of the Andromeda galaxy or even the Virgo cluster.
@article{arxiv.1802.05661,
title = {LISA sources in Milky Way globular clusters},
author = {Kyle Kremer and Sourav Chatterjee and Katelyn Breivik and Carl L. Rodriguez and Shane L. Larson and Frederic A. Rasio},
journal= {arXiv preprint arXiv:1802.05661},
year = {2018}
}
Comments
7 pages, 4 figures, 2 appendices. As published in Physical Review Letters