Magnetic field evolution in superconducting neutron stars

Graber, Vanessa, Andersson, Nils, Glampedakis, Kostas and Lander, Samuel K. (2015) Magnetic field evolution in superconducting neutron stars. Monthly Notices of the Royal Astronomical Society, 453 (1). pp. 671-681. ISSN 0035-8711

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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.

Item Type: Article
Uncontrolled Keywords: mhd,stars: magnetic field,stars: neutron,astronomy and astrophysics,space and planetary science ,/dk/atira/pure/subjectarea/asjc/3100/3103
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Depositing User: LivePure Connector
Date Deposited: 28 Jan 2020 03:52
Last Modified: 28 Jan 2020 03:52
URI: https://ueaeprints.uea.ac.uk/id/eprint/73805
DOI: 10.1093/mnras/stv1648

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