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The dynamics of neutron star crusts: Lagrangian perturbation theory for a relativistic superfluid-elastic system

The dynamics of neutron star crusts: Lagrangian perturbation theory for a relativistic superfluid-elastic system
The dynamics of neutron star crusts: Lagrangian perturbation theory for a relativistic superfluid-elastic system
The inner crust of a mature neutron star is composed of an elastic lattice of neutron-rich nuclei penetrated by free neutrons. These neutrons can flow relative to the crust once the star cools below the superfluid transition temperature. In order to model the dynamics of this system, which is relevant for a range of problems from pulsar glitches to magnetar seismology and continuous gravitational-wave emission from rotating deformed neutron stars, we need to understand general relativistic Lagrangian perturbation theory for elastic matter coupled to a superfluid component. This paper develops the relevant formalism to the level required for astrophysical applications.
0264-9381
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Haskell, B.
b7753f2d-0fbc-4694-b752-444383d81df3
Comer, G.L.
0ee3a15e-e5c6-43f8-9903-d76faa820bd9
Samuelsson, L.
972a981e-08d5-4c5e-a462-fa36c0af9faa
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Haskell, B.
b7753f2d-0fbc-4694-b752-444383d81df3
Comer, G.L.
0ee3a15e-e5c6-43f8-9903-d76faa820bd9
Samuelsson, L.
972a981e-08d5-4c5e-a462-fa36c0af9faa

Andersson, N., Haskell, B., Comer, G.L. and Samuelsson, L. (2019) The dynamics of neutron star crusts: Lagrangian perturbation theory for a relativistic superfluid-elastic system. Classical and Quantum Gravity, 36 (10), [105004]. (doi:10.1088/1361-6382/ab12a1).

Record type: Article

Abstract

The inner crust of a mature neutron star is composed of an elastic lattice of neutron-rich nuclei penetrated by free neutrons. These neutrons can flow relative to the crust once the star cools below the superfluid transition temperature. In order to model the dynamics of this system, which is relevant for a range of problems from pulsar glitches to magnetar seismology and continuous gravitational-wave emission from rotating deformed neutron stars, we need to understand general relativistic Lagrangian perturbation theory for elastic matter coupled to a superfluid component. This paper develops the relevant formalism to the level required for astrophysical applications.

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Accepted/In Press date: 22 March 2019
e-pub ahead of print date: 15 April 2019
Published date: 15 April 2019

Identifiers

Local EPrints ID: 430762
URI: http://eprints.soton.ac.uk/id/eprint/430762
ISSN: 0264-9381
PURE UUID: 4493bf26-10ac-496c-8a18-4df5c281fec4
ORCID for N. Andersson: ORCID iD orcid.org/0000-0001-8550-3843

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Date deposited: 10 May 2019 16:30
Last modified: 15 Apr 2020 04:01

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