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Magnetohydrodynamics of superfluid and superconducting neutron star cores
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 410, 805-829 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
John Wiley & Sons , 2011. Vol. 410, 805-829 p.
Keyword [en]
MHD, stars: magnetic field, stars: neutron
National Category
Astronomy, Astrophysics and Cosmology
Research subject
URN: urn:nbn:se:umu:diva-38667DOI: 10.1111/j.1365-2966.2010.17484.xOAI: diva2:379961
Available from: 2010-12-20 Created: 2010-12-20 Last updated: 2011-05-26

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Samuelsson, Lars
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