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The g-mode spectrum of reactive neutron star cores

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.
0035-8711
4043-4048
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Pnigouras, P.
e7fc1316-2ac6-4f1a-8d7e-5b76e442e2bf
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), 4043-4048. (doi:10.1093/mnras/stz2449).

Record type: Article

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: 0035-8711
PURE UUID: 816accb0-7bbd-40db-9459-09c9b1da7ce0
ORCID for N. Andersson: ORCID iD orcid.org/0000-0001-8550-3843
ORCID for P. Pnigouras: ORCID iD orcid.org/0000-0003-1895-9431

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Date deposited: 18 Nov 2019 17:30
Last modified: 10 Dec 2019 01:51

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