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ID: 335070.0, MPI für Gravitationsphysik / Astrophysical Relativity
Torsional oscillations of slowly rotating relativistic stars
Authors:Vavoulidis, M.; Stavridis, A.; Kokkotas, Kostas D.; Beyer, Horst
Date of Publication (YYYY-MM-DD):2007-06-01
Title of Journal:Monthly Notices of the Royal Astronomical Society Letters
Volume:377
Issue / Number:4
Start Page:1553
End Page:1556
Review Status:not specified
Audience:Not Specified
Abstract / Description:We study the effects of rotation on the torsional modes of oscillating relativistic stars with a solid crust. Earlier works in Newtonian theory provided estimates of the rotational corrections for the torsional modes and suggested that they should become Chandrasekhar–Friedman–Schutz unstable, even for quite low rotation rates. In this work, we study the effect of rotation in the context of general relativity using elasticity theory and in the slow-rotation approximation. We find that the Newtonian picture does not change considerably. The inclusion of relativistic effects leads only to quantitative corrections. The degeneracy of modes for different values of m is removed, and modes with ℓ = m are shifted towards zero frequencies and become secularly unstable at stellar rotational frequencies ~20–30 Hz.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
Identifiers:ISI:000246798200015 [ID No:1]
ISSN:0035-8711 [ID No:2]
DOI:10.1111/j.1365-2966.2007.11706.x
LOCALID:arXiv:gr-qc/0703039
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