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ID: 206205.0, MPI für Gravitationsphysik / Astrophysical Relativity
Second-order rotational effects on the r-modes of neutron stars.
Authors:Lindblom, Lee; Mendell, Gregory; Owen, Benjamin J.
Date of Publication (YYYY-MM-DD):1999
Title of Journal:Physical Review D
Volume:60
Issue / Number:6
Sequence Number of Article:064006
Copyright:Jahrbuch 2000, Copyright MPG 2000
Review Status:not specified
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Techniques are developed here for evaluating the r-modes of rotating neutron stars through second order in the angular velocity of the star. Second-order corrections to the frequencies and eigenfunctions for these modes are evaluated for neutron star models. The second-order eigenfunctions for these modes are determined here by solving an unusual inhomogeneous hyperbolic boundary-value problem. The numerical techniques developed to solve this unusual problem are somewhat non-standard and may well be of interest beyond the particular application here. The bulk-viscosity coupling to the r-modes, which appears first at second order, is evaluated. The bulk-viscosity time scales are found here to be longer than previous estimates for normal neutron stars, but shorter than previous estimates for strange stars. These new time scales do not substantially affect the current picture of the gravitational radiation driven instability of the r-modes either for neutron stars or for strange stars.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
Identifiers:LOCALID:16433
ISSN:1089-4918
DOI:10.1103/PhysRevD.60.064006
URL:http://link.aps.org/abstract/PRD/v60/e064006
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