Neutron star tidal disruption in mixed binaries: The imprint of the equation of state

Ferrari, V., Gualtieri, L. and Pannarale, Francesco ORCID: https://orcid.org/0000-0002-7537-3210 2010. Neutron star tidal disruption in mixed binaries: The imprint of the equation of state. Physical Review D 81 (6) , 064026. 10.1103/PhysRevD.81.064026

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Abstract

We study the tidal disruption of neutron stars in black hole-neutron star coalescing binaries. We calculate the critical orbital separation at which the star is disrupted by the black hole tidal field for several equations of state describing the matter inside the neutron star, and for a large set of the binary parameters. When the disruption occurs before the star reaches the innermost stable circular orbit, the gravitational wave (GW) signal emitted by the system is expected to exhibit a cutoff frequency νGW tide, which is a distinctive feature of the waveform. We evaluate νGW tide and show that, if this frequency will be found in a detected gravitational wave, it will allow one to determine the neutron star radius with an error of a few percent, providing valuable information on the behavior of matter in the stellar core.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Additional Information:	Online publication date: 22 March 2010.
Publisher:	American Physical Society
ISSN:	1550-7998
Last Modified:	25 Oct 2022 08:34
URI:	https://orca.cardiff.ac.uk/id/eprint/53470

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