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  Constraining the Neutron Star Radius with Joint Gravitational-Wave and Short Gamma-Ray Burst Observations of Neutron Star-Black Hole Coalescing Binaries

Ascenzi, S., De Lillo, N., Haster, C.-J., Ohme, F., & Pannarale, F. (2019). Constraining the Neutron Star Radius with Joint Gravitational-Wave and Short Gamma-Ray Burst Observations of Neutron Star-Black Hole Coalescing Binaries. The Astrophysical Journal, 877(2): 94. doi:10.3847/1538-4357/ab1b15.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4AF7-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-CCD0-C
Genre: Journal Article

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 Creators:
Ascenzi, Stefano, Author
De Lillo, Nicola, Author
Haster, Carl-Johan, Author
Ohme, Frank1, Author              
Pannarale, Francesco, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc
 Abstract: Coalescing neutron star (NS)-black hole (BH) binaries are promising sources of gravitational-waves (GWs) to be detected within the next few years by current GW observatories. If the NS is tidally disrupted outside the BH innermost stable circular orbit, an accretion torus may form, and this could eventually power a short gamma-ray burst (SGRB). The observation of an SGRB in coincidence with gravitational radiation from an NS-BH coalescence would confirm the association between the two phenomena and also give us new insights on NS physics. We present here a new method to measure NS radii and thus constrain the NS equation of state using joint SGRB and GW observations of NS-BH mergers. We show that in the event of a joint detection with realistic GW signal-to-noise ratio (S/N) of 10, the NS radius can be constrained to $\lesssim\,$20% accuracy at 90% confidence.

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 Dates: 2018-08-212019
 Publication Status: Published in print
 Pages: 14 pages, 10 figures, 1 table. Submitted to ApJ
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 Identifiers: arXiv: 1808.06848
URI: http://arxiv.org/abs/1808.06848
DOI: 10.3847/1538-4357/ab1b15
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 877 (2) Sequence Number: 94 Start / End Page: - Identifier: -