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Observational limits on the rate of radiation-driven binary black hole capture events

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Title
Observational limits on the rate of radiation-driven binary black hole capture events
Author(s)
Ebersold, Michael; Tiwari, Shubhanshu; Smith, Leigh; Yeong-Bok Bae; Kang, Gungwon; Williams, Daniel; Gopakumar, Achamveedu; Heng, Ik Siong; Haney, Maria
Publication Date
2022-11
Journal
Physical Review D, v.106, no.10
Publisher
American Physical Society
Abstract
© 2022 American Physical Society. Dense astrophysical environments like globular clusters and galactic nuclei can host hyperbolic encounters of black holes which can lead to gravitational-wave driven capture. There are several astrophysical models which predict a fraction of binary black hole mergers to come from these radiation-driven capture scenarios. In this paper, we present the sensitivity of a search toward gravitational-wave driven capture events for O3, the third observing run of LIGO and Virgo. We use capture waveforms produced by numerical relativity simulations covering four different mass ratios and at least two different values of initial angular momentum per mass ratio. We employed the most generic search for short-duration transients in O3 to evaluate the search sensitivity in this parameter space for a wide range in total mass in terms of visible spacetime volume. From the visible spacetime volume we determine for the first time the merger rate upper limit of such systems. The most stringent estimate of rate upper limits at 90% confidence is 0.2 Gpc-3 yr-1 for an equal mass 200 M⊙ binary. Furthermore, in recent studies the event GW190521 has been suggested to be a capture event. With this interpretation of GW190521, we find the merger rate of similar events to be 0.47 Gpc-3 yr-1.
URI
https://pr.ibs.re.kr/handle/8788114/12558
DOI
10.1103/PhysRevD.106.104014
ISSN
2470-0010
Appears in Collections:
HiddenCommunity > 1. Journal Papers (저널논문)
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