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  Constraints on compact dark matter from gravitational wave microlensing

Basak, S., Ganguly, A., Haris, K., Kapadia, S., Mehta, A. K., & Ajith, P. (2022). Constraints on compact dark matter from gravitational wave microlensing. Astrophysical Journal Letters, 926: L28. doi:10.3847/2041-8213/ac4dfa.

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 Creators:
Basak, S., Author
Ganguly, A., Author
Haris, K., Author
Kapadia, S., Author
Mehta, A. K.1, Author              
Ajith, P., Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: If a significant fraction of dark matter is in the form of compact objects, they will cause microlensing effects in the gravitational wave (GW) signals observable by LIGO and Virgo. From the non-observation of microlensing signatures in the binary black hole events from the first two observing runs and the first half of the third observing run, we constrain the fraction of compact dark matter in the mass range $10^2-10^5~{M_\odot}$ to be less than $\simeq 50-80\%$ (details depend on the assumed source population properties and the Bayesian priors). These modest constraints will be significantly improved in the next few years with the expected detection of thousands of binary black hole events, providing a new avenue to probe the nature of dark matter.

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 Dates: 2021-09-142022-02-222022
 Publication Status: Published in print
 Pages: 9 pages, 12 figures, published version
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2109.06456
DOI: 10.3847/2041-8213/ac4dfa
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Title: Astrophysical Journal Letters
  Other : ApJL
Source Genre: Journal
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Publ. Info: Bristol, UK : Institute of Physics Publishing (IOP)
Pages: - Volume / Issue: 926 Sequence Number: L28 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_1