Magnetic neutron star equilibria with stratification and type II superconductivity

Lander, S. K., Andersson, N. and Glampedakis, K. (2012) Magnetic neutron star equilibria with stratification and type II superconductivity. Monthly Notices of the Royal Astronomical Society, 419 (1). pp. 732-747. ISSN 0035-8711

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We construct two-fluid equilibrium configurations for neutron stars (NSs) with magnetic fields, using a self-consistent and non-linear numerical approach. The two-fluid approach - likely to be valid for large regions of all but the youngest NSs - provides us with a straightforward way to introduce stratification and allows for more realistic models than the ubiquitous barotropic assumption. In all our models, the neutrons are modelled as a superfluid, whilst for the protons we consider two cases: one where they are a normal fluid and another where they form a type II superconductor. We consider a variety of field configurations in the normal-proton case and purely toroidal fields in the superconducting case. We find that stratification allows for a stronger toroidal component in mixed-field configurations, though the poloidal component remains the largest in all our models. We provide quantitative results for magnetic ellipticities of NSs, both in the normal- and superconducting-proton cases.

Item Type: Article
Uncontrolled Keywords: mhd,stars: magnetars,stars: magnetic field,stars: neutron,astronomy and astrophysics,space and planetary science ,/dk/atira/pure/subjectarea/asjc/3100/3103
Faculty \ School: Faculty of Science > School of Physics
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Depositing User: LivePure Connector
Date Deposited: 28 Jan 2020 03:52
Last Modified: 22 Oct 2022 05:45
DOI: 10.1111/j.1365-2966.2011.19720.x

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