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arXiv · 1802.05661

LISA sources in Milky Way globular clusters

Kyle Kremer·Sourav Chatterjee·Katelyn Breivik·Carl L. Rodriguez·Shane L. Larson·Frederic A. Rasio
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Abstract

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 $\sim21$ 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 $\sim7$ 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.

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Kyle Kremer, Sourav Chatterjee, Katelyn Breivik, Carl L. Rodriguez, Shane L. Larson, Frederic A. Rasio. 2018-02-15. LISA sources in Milky Way globular clusters. https://doi.org/10.1103/physrevlett.120.191103

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