LISA Sources in Milky Way Globular Clusters
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 ∼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.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2018
- DOI:
- 10.1103/PhysRevLett.120.191103
- arXiv:
- arXiv:1802.05661
- Bibcode:
- 2018PhRvL.120s1103K
- Keywords:
-
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 7 pages, 4 figures, 2 appendices. As published in Physical Review Letters