Evolution of superhigh magnetic fields of magnetars

Abstract

In this paper, we consider the effect of Landau levels on the decay of superhigh magnetic fields of magnetars. Applying ${}^3{P}_2$ anisotropic neutron superfluid theory yield a second-order differential equation for a superhigh magnetic field $B$ and its evolutionary timescale $t$. The superhigh magnetic fields may evolve on timescales $\sim (10^6-10^7)$ yrs for common magnetars. According to our model, the activity of a magnetar may originate from instability caused by the high electron Fermi energy.

8 Pages, 3 Figures, Published in Astrophys. Space. Sci. 2011. 333, p.427-435

References in corpus (4)

• Supernova remnant energetics and magnetars: no evidence in favour of millisecond proto-neutron stars
• The physics of strong magnetic fields in neutron stars
• Numerical simulation of the electron capture process in a magnetar interior
• The physics of strong magnetic fields and activity of magnetars

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• Reinvestigation of the electron fraction and electron Fermi energy of neutron star
• Strong screening effects on resonant nuclear reaction ${}^{23}$Mg $(p,\gamma )$ ${}^{24}$Al in the surface of magnetars