Evolution of superhigh magnetic fields of magnetars. (English) Zbl 1237.85014
Summary: 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.
MSC:
| 85A15 | Galactic and stellar structure |
| 85A30 | Hydrodynamic and hydromagnetic problems in astronomy and astrophysics |
| 83C50 | Electromagnetic fields in general relativity and gravitational theory |
| 76W05 | Magnetohydrodynamics and electrohydrodynamics |
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