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Lagrangian perturbation theory for a superfluid immersed in an elastic neutron star crust
School of Mathematics, University of Southampton.
Astronomical Institute "Anton Pannekoek, University of Amsterdam.
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. 416, no 1, 118-132 p.Article in journal (Refereed) Published
Abstract [en]

The inner crust of mature neutron stars, where an elastic lattice of neutron-rich nuclei coexists with a neutron superfluid, impacts on a range of astrophysical phenomena. The presence of the superfluid is key to our understanding of pulsar glitches, and is expected to affect the thermal conductivity and hence the evolution of the surface temperature. The coupling between crust and superfluid must also be accounted for in studies of neutron star dynamics, discussions of global oscillations and associated instabilities. In this paper we develop Lagrangian perturbation theory for this problem, paying attention to key issues like superfluid entrainment, potential vortex pinning, dissipative mutual friction and the star's magnetic field. We also discuss the nature of the core-crust interface. The results provide a theoretical foundation for a range of interesting astrophysical applications.

Place, publisher, year, edition, pages
Oxford: Blackwell Scientific Publications , 2011. Vol. 416, no 1, 118-132 p.
Keyword [en]
asteroseismology, dense matter, gravitational waves, hydrodynamics, stars: neutron
National Category
Astronomy, Astrophysics and Cosmology
Research subject
URN: urn:nbn:se:umu:diva-44226DOI: 10.1111/j.1365-2966.2011.19015.xOAI: diva2:419413
Available from: 2011-05-26 Created: 2011-05-26 Last updated: 2011-10-03Bibliographically approved

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