Magnetic field evolution in superconducting neutron stars
Magnetic field evolution in superconducting neutron stars
The presence of superconducting and superfluid components in the core of mature neutron stars calls for the rethinking of a number of key magnetohydrodynamical notions like resistivity, the induction equation, magnetic energy and flux-freezing. Using a multifluid magnetohydrodynamics formalism, we investigate how the magnetic field evolution is modified when neutron star matter is composed of superfluid neutrons, type-II superconducting protons and relativistic electrons. As an application of this framework, we derive an induction equation where the resistive coupling originates from the mutual friction between the electrons and the vortex/fluxtube arrays of the neutron and proton condensates. The resulting induction equation allows the identification of two time-scales that are significantly different from those of standard magnetohydrodynamics. The astrophysical implications of these results are briefly discussed.
671-681
Graber, Vanessa
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Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas
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Lander, Samuel
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October 2015
Graber, Vanessa
dcdc6f13-c329-46ee-829e-a03fab87187b
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Lander, Samuel
f9fe4b41-e092-4bcb-869d-080996442dd1
Graber, Vanessa, Andersson, Nils, Glampedakis, Kostas and Lander, Samuel
(2015)
Magnetic field evolution in superconducting neutron stars.
Monthly Notices of the Royal Astronomical Society, 453 (1), .
(doi:10.1093/mnras/stv1648).
Abstract
The presence of superconducting and superfluid components in the core of mature neutron stars calls for the rethinking of a number of key magnetohydrodynamical notions like resistivity, the induction equation, magnetic energy and flux-freezing. Using a multifluid magnetohydrodynamics formalism, we investigate how the magnetic field evolution is modified when neutron star matter is composed of superfluid neutrons, type-II superconducting protons and relativistic electrons. As an application of this framework, we derive an induction equation where the resistive coupling originates from the mutual friction between the electrons and the vortex/fluxtube arrays of the neutron and proton condensates. The resulting induction equation allows the identification of two time-scales that are significantly different from those of standard magnetohydrodynamics. The astrophysical implications of these results are briefly discussed.
More information
e-pub ahead of print date: 17 August 2015
Published date: October 2015
Organisations:
Applied Mathematics
Identifiers
Local EPrints ID: 410567
URI: http://eprints.soton.ac.uk/id/eprint/410567
ISSN: 1365-2966
PURE UUID: 12e19e8e-a9ea-498c-8347-4f3e55b7f271
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Date deposited: 09 Jun 2017 09:08
Last modified: 16 Mar 2024 03:02
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Contributors
Author:
Vanessa Graber
Author:
Kostas Glampedakis
Author:
Samuel Lander
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