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Some Theoretical Aspects of Magnetars

Indian Institute of Technology Jodhpur, Karwar 342 037, Jodhpur District, India
Particles 2018, 1(1), 111-125;
Received: 31 January 2018 / Revised: 29 April 2018 / Accepted: 4 May 2018 / Published: 9 May 2018
PDF [413 KB, uploaded 20 July 2018]


Magnetars have been observationally determined to have surface magnetic fields of order of 10 14 10 15 G, and the implied internal field strength may be even larger. We discuss the effect of strong field on the dense matter expected to be inside neutron stars. We describe the microphysics, phenomenology, and astrophysical implications of strong field induced unpairing effect that may occur in magnetars, if the local magnetic field in the core of a magnetar exceeds a critical value. The density dependence of the pairing of proton condensate implies that the critical value required for the unpairing effect to occur is maximal at the crust–core interface and decreases towards the center of the star. As a consequence, magnetar cores with homogeneous constant fields will be partially superconducting for “medium-field” magnetars, whereas “strong-field” magnetars will be void of superconductivity. We also discuss its effect on some observational phenomena which depend on the nature and composition of matter inside neutron stars. View Full-Text
Keywords: neutron stars; nuclear matter; strong magnetic fields; quark matter; superconductivity; neutrino emissivity neutron stars; nuclear matter; strong magnetic fields; quark matter; superconductivity; neutrino emissivity

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Sinha, M. Some Theoretical Aspects of Magnetars. Particles 2018, 1, 111-125.

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