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Magnetohydrodynamics of superfluid and superconducting neutron star cores

Magnetohydrodynamics of superfluid and superconducting neutron star cores
Magnetohydrodynamics of superfluid and superconducting neutron star cores
Mature neutron stars are cold enough to contain a number of superfluid and superconducting components. These systems are distinguished by the presence of additional dynamical degrees of freedom associated with superfluidity. In order to consider models with mixtures of condensates, we need to develop a multifluid description that accounts for the presence of rotational neutron vortices and magnetic proton fluxtubes. We also need to model the forces that impede the motion of vortices and fluxtubes, and understand how these forces act on the condensates. This paper concerns the development of such a model for the outer core of a neutron star, where superfluid neutrons co-exist with a type II proton superconductor and an electron gas. We discuss the hydrodynamics of this system, focusing on the role of the entrainment effect, the magnetic field, the vortex/fluxtube tension and the dissipative mutual friction forces. Our final results can be directly applied to a number of interesting astrophysical scenarios, e.g. associated with neutron star oscillations or the evolution of the large-scale magnetic field
1365-2966
805-829
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Samuelsson, Lars
ce25b720-ee5b-4b1a-af84-c38a41399a62
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Samuelsson, Lars
ce25b720-ee5b-4b1a-af84-c38a41399a62

Glampedakis, Kostas, Andersson, Nils and Samuelsson, Lars (2011) Magnetohydrodynamics of superfluid and superconducting neutron star cores. Monthly Notices of the Royal Astronomical Society, 410 (2), 805-829. (doi:10.1111/j.1365-2966.2010.17484.x).

Record type: Article

Abstract

Mature neutron stars are cold enough to contain a number of superfluid and superconducting components. These systems are distinguished by the presence of additional dynamical degrees of freedom associated with superfluidity. In order to consider models with mixtures of condensates, we need to develop a multifluid description that accounts for the presence of rotational neutron vortices and magnetic proton fluxtubes. We also need to model the forces that impede the motion of vortices and fluxtubes, and understand how these forces act on the condensates. This paper concerns the development of such a model for the outer core of a neutron star, where superfluid neutrons co-exist with a type II proton superconductor and an electron gas. We discuss the hydrodynamics of this system, focusing on the role of the entrainment effect, the magnetic field, the vortex/fluxtube tension and the dissipative mutual friction forces. Our final results can be directly applied to a number of interesting astrophysical scenarios, e.g. associated with neutron star oscillations or the evolution of the large-scale magnetic field

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Published date: January 2011
Organisations: Mathematics

Identifiers

Local EPrints ID: 181255
URI: http://eprints.soton.ac.uk/id/eprint/181255
ISSN: 1365-2966
PURE UUID: b1d01598-76eb-4f5d-990d-3e3e678c000f
ORCID for Nils Andersson: ORCID iD orcid.org/0000-0001-8550-3843

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Date deposited: 15 Apr 2011 14:28
Last modified: 15 Mar 2024 02:59

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Contributors

Author: Kostas Glampedakis
Author: Nils Andersson ORCID iD
Author: Lars Samuelsson

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