Non-axisymmetric oscillations of differentially rotating relativistic stars
Non-axisymmetric oscillations of differentially rotating relativistic stars
Non-axisymmetric oscillations of differentially rotating stars are studied using both slow rotation and Cowling approximation. The equilibrium stellar models are relativistic polytropes where differential rotation is described by the relativistic j-constant rotation law. The oscillation spectrum is studied versus three main parameters: the stellar compactness M/R, the degree of differential rotation A and the number of maximun couplings [script-I]max. It is shown that the rotational splitting of the non-axisymmetric modes is strongly enhached by increasing the compactness of the star and the degree of differential rotation. Finally, we investigate the relation between the fundamental quadrupole mode and the corotation band of differentially rotating stars.
spectral properties of differentially rotating neutron stars.
024029-[14pp]
Passamonti, Andrea
ca736053-559e-4c50-8a5c-92a0364d42c5
Stavridis, Adamantios
5302c0be-22f1-404c-a859-a2249dc54fe7
Kokkotas, Kostas D.
0b8bb98a-a65f-434b-855b-ec5b488b4a96
17 January 2008
Passamonti, Andrea
ca736053-559e-4c50-8a5c-92a0364d42c5
Stavridis, Adamantios
5302c0be-22f1-404c-a859-a2249dc54fe7
Kokkotas, Kostas D.
0b8bb98a-a65f-434b-855b-ec5b488b4a96
Passamonti, Andrea, Stavridis, Adamantios and Kokkotas, Kostas D.
(2008)
Non-axisymmetric oscillations of differentially rotating relativistic stars.
Physical Review D, 77 (2), .
(doi:10.1103/PhysRevD.77.024029).
Abstract
Non-axisymmetric oscillations of differentially rotating stars are studied using both slow rotation and Cowling approximation. The equilibrium stellar models are relativistic polytropes where differential rotation is described by the relativistic j-constant rotation law. The oscillation spectrum is studied versus three main parameters: the stellar compactness M/R, the degree of differential rotation A and the number of maximun couplings [script-I]max. It is shown that the rotational splitting of the non-axisymmetric modes is strongly enhached by increasing the compactness of the star and the degree of differential rotation. Finally, we investigate the relation between the fundamental quadrupole mode and the corotation band of differentially rotating stars.
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Submitted date: 7 June 2007
Published date: 17 January 2008
Keywords:
spectral properties of differentially rotating neutron stars.
Identifiers
Local EPrints ID: 63196
URI: http://eprints.soton.ac.uk/id/eprint/63196
ISSN: 1550-7998
PURE UUID: 799fb2c8-ca22-4042-8f39-784b83a6120d
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Date deposited: 17 Sep 2008
Last modified: 15 Mar 2024 11:36
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Contributors
Author:
Andrea Passamonti
Author:
Adamantios Stavridis
Author:
Kostas D. Kokkotas
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