The impact of nuclear reactions on the neutron-star g-mode spectrum
The impact of nuclear reactions on the neutron-star g-mode spectrum
Mature neutron stars are expected to exhibit gravity g modes due to stratification caused by a varying matter composition. These modes are affected by nuclear reactions, leading to complex (damped) mode frequencies and the suppression of high-order g modes. This is in contrast with the common non-dissipative analysis which leads to an infinite g-mode spectrum. Focusing on the transition between the fast- and slow-reaction regimes, we examine the precise impact of nuclear reactions on the g-mode spectrum. The general framework for the analysis is presented along with sample numerical results for a matter model based on the BSk21 equation of state with a suitable parametrization for the reaction rates.
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, General Relativity and Quantum Cosmology, Nuclear Theory
1721–1729
Counsell, A.R.
fd22c224-70e7-4c23-a425-05b76f3b2be4
Gittins, F.
657ec875-fac3-4606-9dcd-591ef22fc9f6
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
25 May 2024
Counsell, A.R.
fd22c224-70e7-4c23-a425-05b76f3b2be4
Gittins, F.
657ec875-fac3-4606-9dcd-591ef22fc9f6
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Counsell, A.R., Gittins, F. and Andersson, N.
(2024)
The impact of nuclear reactions on the neutron-star g-mode spectrum.
Monthly Notices of the Royal Astronomical Society, 531 (1), .
(doi:10.1093/mnras/stae1242).
Abstract
Mature neutron stars are expected to exhibit gravity g modes due to stratification caused by a varying matter composition. These modes are affected by nuclear reactions, leading to complex (damped) mode frequencies and the suppression of high-order g modes. This is in contrast with the common non-dissipative analysis which leads to an infinite g-mode spectrum. Focusing on the transition between the fast- and slow-reaction regimes, we examine the precise impact of nuclear reactions on the g-mode spectrum. The general framework for the analysis is presented along with sample numerical results for a matter model based on the BSk21 equation of state with a suitable parametrization for the reaction rates.
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Accepted/In Press date: 9 May 2024
e-pub ahead of print date: 10 May 2024
Published date: 25 May 2024
Keywords:
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, General Relativity and Quantum Cosmology, Nuclear Theory
Identifiers
Local EPrints ID: 494163
URI: http://eprints.soton.ac.uk/id/eprint/494163
ISSN: 1365-2966
PURE UUID: 31ea7c01-5cd7-4295-b4bc-c867eed18f2a
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Date deposited: 25 Sep 2024 16:53
Last modified: 26 Sep 2024 02:01
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Author:
F. Gittins
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