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  Oscillations of rapidly rotating relativistic stars

Gaertig, E., & Kokkotas, K. D. (2008). Oscillations of rapidly rotating relativistic stars. Physical Review D, 78(6): 064063. doi:10.1103/PhysRevD.78.064063.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-13AC-1 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-13AE-E
Genre: Journal Article

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PRD78-064063.pdf (Publisher version), 865KB
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Gaertig, Erich1, Author
Kokkotas, Kostas D.2, Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24010              
2External Organizations, Theoretical Astrophysics, University of Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, ou_persistent22              

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 Abstract: Nonaxisymmetric oscillations of rapidly rotating relativistic stars are studied using the Cowling approximation. The oscillation spectra have been estimated by Fourier transforming the evolution equations describing the perturbations. This is the first study of its kind and provides information on the effect of fast rotation on the oscillation spectra while it offers the possibility of studying the complete problem by including space-time perturbations. Our study includes both axisymmetric and nonaxisymmetric perturbations and provides limits for the onset of the secular bar mode rotational instability. We also present approximate formulas for the dependence of the oscillation spectrum from rotation. The results suggest that it is possible to extract the relativistic star's parameters from the observed gravitational wave spectrum.

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 Dates: 2008-09-25
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: URI: http://link.aps.org/doi/10.1103/PhysRevD.78.064063
DOI: 10.1103/PhysRevD.78.064063
eDoc: 398328
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 78 (6) Sequence Number: 064063 Start / End Page: - Identifier: ISSN: 1089-4918