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Nonlinear radial oscillations of neutron stars

Nonlinear radial oscillations of neutron stars
Nonlinear radial oscillations of neutron stars
The effects of nonlinear oscillations in compact stars are attracting considerable current interest. In order to study such phenomena in the framework of fully nonlinear general relativity, highly accurate numerical studies are required. A numerical scheme specifically tailored for such a study is based on formulating the time evolution in terms of deviations from a stationary equilibrium configuration.

Using this technique, we investigate over a wide range of amplitudes nonlinear effects in the evolution of radial oscillations of neutron stars. In particular, we discuss mode coupling due to nonlinear interaction, the occurrence of resonance phenomena, shock formation near the stellar surface as well as the capacity of nonlinearities to stabilize perturbatively unstable neutron star models.
1550-7998
64012
Gabler, Michael
8f33d92e-77fa-4fbc-adfc-af15ec0e3603
Sperhake, Ulrich
636ee47a-21ea-4e1e-9095-53476aa89c0e
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Gabler, Michael
8f33d92e-77fa-4fbc-adfc-af15ec0e3603
Sperhake, Ulrich
636ee47a-21ea-4e1e-9095-53476aa89c0e
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304

Gabler, Michael, Sperhake, Ulrich and Andersson, Nils (2009) Nonlinear radial oscillations of neutron stars. Physical Review D, 80 (6), 64012. (doi:10.1103/PhysRevD.80.064012).

Record type: Article

Abstract

The effects of nonlinear oscillations in compact stars are attracting considerable current interest. In order to study such phenomena in the framework of fully nonlinear general relativity, highly accurate numerical studies are required. A numerical scheme specifically tailored for such a study is based on formulating the time evolution in terms of deviations from a stationary equilibrium configuration.

Using this technique, we investigate over a wide range of amplitudes nonlinear effects in the evolution of radial oscillations of neutron stars. In particular, we discuss mode coupling due to nonlinear interaction, the occurrence of resonance phenomena, shock formation near the stellar surface as well as the capacity of nonlinearities to stabilize perturbatively unstable neutron star models.

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Published date: 2009

Identifiers

Local EPrints ID: 151311
URI: http://eprints.soton.ac.uk/id/eprint/151311
ISSN: 1550-7998
PURE UUID: 027c9db6-09ed-4648-ab1e-7d12b8ffc1cb
ORCID for Nils Andersson: ORCID iD orcid.org/0000-0001-8550-3843

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Date deposited: 10 May 2010 10:51
Last modified: 28 Jun 2022 01:36

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Contributors

Author: Michael Gabler
Author: Ulrich Sperhake
Author: Nils Andersson ORCID iD

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