Boundary-layer analysis of the core-crust interface in neutron stars
Boundary-layer analysis of the core-crust interface in neutron stars
We investigate the influence of both rigid and elastic crusts on r-mode oscillations in a neutron star core fluid. This work is motivated by the possibility that the gravitational-wave driven instability of the inertial r-modes may become active in rapidly spinning neutron stars, eg. in low-mass X-ray binaries, and the fact that viscous Ekman layers at the core-crust interface provide an efficient damping mechanism for these oscillations. We review various approaches to the problem and carry out an analytic calculation of the effects due to the Ekman layer for rigid crusts, and a simplistic model of an elastic neutron star crust with constant shear modulus. Our analytic estimates support previous numerical results, and provide insights into the intricate effects present in the problem.
1-30
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
2004
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas and Andersson, Nils
(2004)
Boundary-layer analysis of the core-crust interface in neutron stars.
arXiv, 1, .
Abstract
We investigate the influence of both rigid and elastic crusts on r-mode oscillations in a neutron star core fluid. This work is motivated by the possibility that the gravitational-wave driven instability of the inertial r-modes may become active in rapidly spinning neutron stars, eg. in low-mass X-ray binaries, and the fact that viscous Ekman layers at the core-crust interface provide an efficient damping mechanism for these oscillations. We review various approaches to the problem and carry out an analytic calculation of the effects due to the Ekman layer for rigid crusts, and a simplistic model of an elastic neutron star crust with constant shear modulus. Our analytic estimates support previous numerical results, and provide insights into the intricate effects present in the problem.
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Published date: 2004
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Local EPrints ID: 29465
URI: http://eprints.soton.ac.uk/id/eprint/29465
PURE UUID: ecb9ba1a-aace-4dd6-9339-34e610e5e5e9
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Date deposited: 12 May 2006
Last modified: 12 Dec 2021 03:04
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Author:
Kostas Glampedakis
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