Neutron star tidal disruption in mixed binaries: The imprint of the equation of state
- Dipartimento di Fisica, 'Sapienza' Universita di Roma and Sezione INFN Roma1, Piazzale Aldo Moro 5, 00185, Roma (Italy)
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 {nu}{sub GW}-tilde, which is a distinctive feature of the waveform. We evaluate {nu}{sub GW}-tilde 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.
- OSTI ID:
- 21409412
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevD.81.064026; (c) 2010 The American Physical Society; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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