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Neutron-star tidal deformability and equation-of-state constraints

Chatziioannou, Katerina (2020) Neutron-star tidal deformability and equation-of-state constraints. General Relativity and Gravitation, 52 (11). Art. No. 109. ISSN 0001-7701. doi:10.1007/s10714-020-02754-3.

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Despite their long history and astrophysical importance, some of the key properties of neutron stars are still uncertain. The extreme conditions encountered in their interiors, involving matter of uncertain composition at extreme density and isospin asymmetry, uniquely determine the stars’ macroscopic properties within General Relativity. Astrophysical constraints on those macroscopic properties, such as neutron-star masses and radii, have long been used to understand the microscopic properties of the matter that forms them. In this article we discuss another astrophysically observable macroscopic property of neutron stars that can be used to study their interiors: their tidal deformation. Neutron stars, much like any other extended object with structure, are tidally deformed when under the influence of an external tidal field. In the context of coalescences of neutron stars observed through their gravitational-wave emission, this deformation, quantified through a parameter termed the tidal deformability, can be measured. We discuss the role of the tidal deformability in observations of coalescing neutron stars with gravitational waves and how it can be used to probe the internal structure of Nature’s most compact matter objects. Perhaps inevitably, a large portion of the discussion will be dictated by GW170817, the most informative confirmed detection of a binary neutron-star coalescence with gravitational waves as of the time of writing.

Item Type:Article
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Chatziioannou, Katerina0000-0002-5833-413X
Additional Information:© Springer Science+Business Media, LLC, part of Springer Nature 2020. Received 18 May 2020; Accepted 09 October 2020; Published 10 November 2020. We thank Sophia Han for useful comments on this manuscript, as well as the LIGO and Virgo Collaboration Extreme Matter working group for invaluable discussions over the years. The Flatiron Institute is supported by the Simons Foundation.
Funding AgencyGrant Number
Simons FoundationUNSPECIFIED
Subject Keywords:Binary neutron stars; Coalescence; Tidal deformation
Issue or Number:11
Record Number:CaltechAUTHORS:20200729-083825839
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Official Citation:Chatziioannou, K. Neutron-star tidal deformability and equation-of-state constraints. Gen Relativ Gravit 52, 109 (2020).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104631
Deposited By: Tony Diaz
Deposited On:29 Jul 2020 15:50
Last Modified:02 Sep 2021 21:54

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