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Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run


Ebersold, M; Hamilton, Eleanor Z; Haney, M; Lopez, D; Tiwari, S; Adhikari, N; Adhikari, R X; Adya, V B; Affeldt, C; Agarwal, D; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, O D; Aiello, L; Ain, A; Ajith, P; Albanesi, S; Allocca, A; Altin, P A; Amato, A; Anand, C; Anand, S; Ananyeva, A; Anderson, S B; Anderson, W G; Andrade, T; Andres, N; Andrić, T; Angelova, S V; et al (2022). Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run. Physical Review Letters, 129(6):061104.

Abstract

We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2 M⊙ and 1.0 M⊙ in Advanced LIGO and Advanced Virgo data collected between 1 April 2019 1500 UTC and 1 October 2019 1500 UTC. We extend our previous analyses in two main ways: we include data from the Virgo detector and we allow for more unequal mass systems, with mass ratio q ≥ 0.1. We do not report any gravitational-wave candidates. The most significant trigger has a false alarm rate of 0.14 yr−1. This implies an upper limit on the merger rate of subsolar binaries in the range ½220 − 24200� Gpc−3 yr−1, depending on the chirp mass of the binary. We use this upper limit to derive
astrophysical constraints on two phenomenological models that could produce subsolar-mass compact objects. One is an isotropic distribution of equal-mass primordial black holes. Using this model, we find that the fraction of dark matter in primordial black holes in the mass range 0.2 M⊙ < mPBH < 1.0 M⊙ is fPBH ≡ ΩPBH=ΩDM ≲ 6%. This improves existing constraints on primordial black hole abundance by a factor of ∼3. The other is a dissipative dark matter model, in which fermionic dark matter can collapse and form black holes. The upper limit on the fraction of dark matter black holes depends on the minimum mass of the black holes that can be formed: the most constraining result is obtained at Mmin ¼ 1 M⊙, where fDBH ≡ ΩDBH=ΩDM ≲ 0.003%. These are the first constraints placed on dissipative dark models by subsolar-mass analyses.

Abstract

We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2 M⊙ and 1.0 M⊙ in Advanced LIGO and Advanced Virgo data collected between 1 April 2019 1500 UTC and 1 October 2019 1500 UTC. We extend our previous analyses in two main ways: we include data from the Virgo detector and we allow for more unequal mass systems, with mass ratio q ≥ 0.1. We do not report any gravitational-wave candidates. The most significant trigger has a false alarm rate of 0.14 yr−1. This implies an upper limit on the merger rate of subsolar binaries in the range ½220 − 24200� Gpc−3 yr−1, depending on the chirp mass of the binary. We use this upper limit to derive
astrophysical constraints on two phenomenological models that could produce subsolar-mass compact objects. One is an isotropic distribution of equal-mass primordial black holes. Using this model, we find that the fraction of dark matter in primordial black holes in the mass range 0.2 M⊙ < mPBH < 1.0 M⊙ is fPBH ≡ ΩPBH=ΩDM ≲ 6%. This improves existing constraints on primordial black hole abundance by a factor of ∼3. The other is a dissipative dark matter model, in which fermionic dark matter can collapse and form black holes. The upper limit on the fraction of dark matter black holes depends on the minimum mass of the black holes that can be formed: the most constraining result is obtained at Mmin ¼ 1 M⊙, where fDBH ≡ ΩDBH=ΩDM ≲ 0.003%. These are the first constraints placed on dissipative dark models by subsolar-mass analyses.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > General Physics and Astronomy
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:5 August 2022
Deposited On:19 Feb 2023 18:00
Last Modified:28 Jun 2024 01:42
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevlett.129.061104
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  • Content: Published Version
  • Language: English