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  Constraining black hole mimickers with gravitational wave observations

Johnson-McDaniel, N. K., Mukherjee, A., Kashyap, R., Ajith, P., Del Pozzo, W., & Vitale, S. (2020). Constraining black hole mimickers with gravitational wave observations. Physical Review D, 102: 123010. doi:10.1103/PhysRevD.102.123010.

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Johnson-McDaniel, Nathan K., Author
Mukherjee, A.1, Author              
Kashyap, Rahul, Author
Ajith, Parameswaran, Author
Del Pozzo, Walter, Author
Vitale, Salvatore, Author
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,High Energy Physics - Phenomenology, hep-ph
 Abstract: LIGO and Virgo have recently observed a number of gravitational wave (GW) signals that are fully consistent with being emitted by binary black holes described by general relativity. However, there are theoretical proposals of exotic objects that can be massive and compact enough to be easily confused with black holes. Nevertheless, these objects differ from black holes in having nonzero tidal deformabilities, which can allow one to distinguish binaries containing such objects from binary black holes using GW observations. Using full Bayesian parameter estimation, we investigate the possibility of constraining the parameter space of such "black hole mimickers" with upcoming GW observations. Employing perfect fluid stars with a polytropic equation of state as a simple model that can encompass a variety of possible black hole mimickers, we show how the observed masses and tidal deformabilities of a binary constrain the equation of state. We also show how such constraints can be used to rule out some simple models of boson stars.

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 Dates: 2018-04-212018-05-102020-12-07
 Publication Status: Published in print
 Pages: 5 + 4 pages, 4 figures; v2: small changes
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 102 Sequence Number: 123010 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258