LISA Sources in Milky Way Globular Clusters

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 ...

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Bibliographic Details
Published in:Physical review letters 2018-05, Vol.120 (19), p.191103-191103, Article 191103
Main Authors: Kremer, Kyle, Chatterjee, Sourav, Breivik, Katelyn, Rodriguez, Carl L, Larson, Shane L, Rasio, Frederic A
Format: Article
Language:English
Subjects:
Andromeda Galaxy
Galactic clusters
Globular clusters
LISA (antenna)
Milky Way Galaxy
Virgo galactic cluster
White dwarf stars
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.191103