Using gravitational-wave data to constrain dynamical tides in neutron star binaries
Using gravitational-wave data to constrain dynamical tides in neutron star binaries
We discuss the role of dynamical tidal effects for inspiralling neutron star binaries, focussing on features that may be considered "unmodelled" in gravitational-wave searches. In order to cover the range of possibilities, we consider i) individual oscillation modes becoming resonant with the tide, ii) the elliptical instability, where a pair of inertial modes exhibit a nonlinear resonance with the tide, and iii) the non-resonant p-g instability which may arise as high order p- and g-modes in the star couple nonlinearly to the tide. In each case, we estimate the amount of additional energy loss that needs to be associated with the dynamical tide in order for the effect to impact on an observed gravitational-wave signal. We explore to what extent the involved neutron star physics may be considered known and how one may be able to use observational data to constrain theory.
1-14
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
January 2018
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Andersson, Nils and Ho, Wynn C.G.
(2018)
Using gravitational-wave data to constrain dynamical tides in neutron star binaries.
Physical Review D, 97 (2), , [023016].
(doi:10.1103/PhysRevD.97.023016).
Abstract
We discuss the role of dynamical tidal effects for inspiralling neutron star binaries, focussing on features that may be considered "unmodelled" in gravitational-wave searches. In order to cover the range of possibilities, we consider i) individual oscillation modes becoming resonant with the tide, ii) the elliptical instability, where a pair of inertial modes exhibit a nonlinear resonance with the tide, and iii) the non-resonant p-g instability which may arise as high order p- and g-modes in the star couple nonlinearly to the tide. In each case, we estimate the amount of additional energy loss that needs to be associated with the dynamical tide in order for the effect to impact on an observed gravitational-wave signal. We explore to what extent the involved neutron star physics may be considered known and how one may be able to use observational data to constrain theory.
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Accepted/In Press date: 20 December 2017
e-pub ahead of print date: 24 January 2018
Published date: January 2018
Identifiers
Local EPrints ID: 416268
URI: http://eprints.soton.ac.uk/id/eprint/416268
ISSN: 2470-0029
PURE UUID: 928d2cb5-207d-461f-baf2-6474e13a2ac5
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Date deposited: 11 Dec 2017 17:30
Last modified: 16 Mar 2024 03:02
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