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Magnetars are super hot and super cool

Published online by Cambridge University Press:  20 March 2013

Wynn C. G. Ho ,
Kostas Glampedakis  and
Nils Andersson
Wynn C. G. Ho
Affiliation:
School of Mathematics, University of Southampton, Southampton, SO17 1BJ, UK email: [email protected]
Kostas Glampedakis
Affiliation:
Departamento de Física, Universidad de Murcia, E-30100 Murcia, Spain
Nils Andersson
Affiliation:
School of Mathematics, University of Southampton, Southampton, SO17 1BJ, UK email: [email protected]
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Abstract

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We examine to what extent the inferred surface temperature of magnetars in quiescence can constrain the presence of a superfluid in the neutron star core and the role of magnetic field decay in the core. By performing detailed simulations of neutron star cooling, we show that extremely strong heating from field decay in the core cannot produce the high observed surface temperatures nor delay the onset of neutron superfluidity in the core. We find that it is not possible to conclude that magnetar cores are in a non-superfluid state purely from high surface temperatures. We find that neutron superfluidity in the core occurs less than a few hundred years after neutron star formation for core fields < 1016 G. Thus all known neutron stars, including magnetars, without a core containing exotic particles, should have a core of superfluid neutrons and superconducting protons.

Keywords

dense matterneutrinospulsars: generalstars: evolutionstars: neutron
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 396 - 398
Copyright
Copyright © International Astronomical Union 2013

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