The g-mode spectrum of reactive neutron star cores
The g-mode spectrum of reactive neutron star cores
We discuss the impact of nuclear reactions on the spectrum of gravity g-modes of a mature neutron star, demonstrating the anticipated disappearance of these modes when the timescale associated with the oscillations is longer than that of nuclear reactions. This is the expected result, but different aspects of the demonstration may be relevant for related problems in neutron star astrophysics. In particular, we develop the framework required for an explicit implementation of finite-time nuclear reactions in neutron star oscillation problems and demonstrate how this formulation connects with the usual bulk viscosity prescription. We also discuss implications of the absence of very high order g-modes for problems of astrophysical relevance.
4043-4048
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Pnigouras, P.
e7fc1316-2ac6-4f1a-8d7e-5b76e442e2bf
November 2019
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Pnigouras, P.
e7fc1316-2ac6-4f1a-8d7e-5b76e442e2bf
Andersson, N. and Pnigouras, P.
(2019)
The g-mode spectrum of reactive neutron star cores.
Monthly Notices of the Royal Astronomical Society, 489 (3), .
(doi:10.1093/mnras/stz2449).
Abstract
We discuss the impact of nuclear reactions on the spectrum of gravity g-modes of a mature neutron star, demonstrating the anticipated disappearance of these modes when the timescale associated with the oscillations is longer than that of nuclear reactions. This is the expected result, but different aspects of the demonstration may be relevant for related problems in neutron star astrophysics. In particular, we develop the framework required for an explicit implementation of finite-time nuclear reactions in neutron star oscillation problems and demonstrate how this formulation connects with the usual bulk viscosity prescription. We also discuss implications of the absence of very high order g-modes for problems of astrophysical relevance.
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The g-mode spectrum of reactive neutron star cores
- Accepted Manuscript
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Accepted/In Press date: 30 August 2019
e-pub ahead of print date: 13 September 2019
Published date: November 2019
Identifiers
Local EPrints ID: 435670
URI: http://eprints.soton.ac.uk/id/eprint/435670
ISSN: 1365-2966
PURE UUID: 816accb0-7bbd-40db-9459-09c9b1da7ce0
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Date deposited: 18 Nov 2019 17:30
Last modified: 17 Mar 2024 02:47
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Author:
P. Pnigouras
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