W-modes in rotating relativistic stars
W-modes in rotating relativistic stars
We obtain w-mode frequencies of rapidly rotating, relativistic stars, using a 3D fully nonlinear numerical code. The so-called "inverse-Cowling approximation" is used by fixing the evolution of the fluid and allowing only for spacetime dynamics. We demonstrate that in the nonrotating limit the code reproduces known w-mode frequencies obtained through perturbative methods. In the rotating case, we focus on a dynamically unstable model and show that its w-mode frequencies agree well with the gravitational-wave spectrum produced during the initial phase of the dynamical collapse to a Kerr black hole.
stellar rotation, numerical analysis, gravitational waves, gravitational collapse, black holes
0735403430
730-737
Stergioulas, Nikolaos
7ff499f3-91e1-497f-bee6-4d8b5ca581da
Kokkotas, Kostas
61f2621b-14cb-49f8-b57e-6d351d6c18c2
Hawke, Ian
fc964672-c794-4260-a972-eaf818e7c9f4
25 August 2006
Stergioulas, Nikolaos
7ff499f3-91e1-497f-bee6-4d8b5ca581da
Kokkotas, Kostas
61f2621b-14cb-49f8-b57e-6d351d6c18c2
Hawke, Ian
fc964672-c794-4260-a972-eaf818e7c9f4
Stergioulas, Nikolaos, Kokkotas, Kostas and Hawke, Ian
(2006)
W-modes in rotating relativistic stars.
AIP Conference Proceedings, 848, .
(doi:10.1063/1.2348051).
Abstract
We obtain w-mode frequencies of rapidly rotating, relativistic stars, using a 3D fully nonlinear numerical code. The so-called "inverse-Cowling approximation" is used by fixing the evolution of the fluid and allowing only for spacetime dynamics. We demonstrate that in the nonrotating limit the code reproduces known w-mode frequencies obtained through perturbative methods. In the rotating case, we focus on a dynamically unstable model and show that its w-mode frequencies agree well with the gravitational-wave spectrum produced during the initial phase of the dynamical collapse to a Kerr black hole.
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Published date: 25 August 2006
Keywords:
stellar rotation, numerical analysis, gravitational waves, gravitational collapse, black holes
Identifiers
Local EPrints ID: 49014
URI: http://eprints.soton.ac.uk/id/eprint/49014
ISBN: 0735403430
ISSN: 1551-7616
PURE UUID: 052a5a06-5f6d-4ef3-a144-1e9805f17177
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Date deposited: 19 Oct 2007
Last modified: 16 Mar 2024 03:45
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Contributors
Author:
Nikolaos Stergioulas
Author:
Kostas Kokkotas
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