A great deal of interest has been recently raised in connection with the possibility that soft γ-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) contain magnetars, young neutron stars endowed with magnetic fields ∼> 10 14 G. In this paper we calculate thermal spectra from ultra-magnetized neutron stars for values of the luminosity and magnetic field believed to be relevant to SGRs and A...

Magnetospheres of neutron stars are anchored in the rigid crust and can be twisted by sudden crustal motions (“starquakes”). The twisted magnetosphere does not remain static and gradually untwists, dissipating magnetic energy and producing radiation. The equation describing this evolution is derived, and its solutions are presented. Two distinct regions coexist in an untwisting magnetosphere: a...

The repeating FRBs 180916.J0158 and 121102 are visible during periodically-occuring windows in time. We consider the constraints on internal magnetic fields geometry if cyclical behavior observed for FRB~180916.J0158 FRB is due to precession of magnetars. In order frustrate vortex line pinning we argue that must be stronger than about $10^{16}$ Gauss, which large enough prevent superconductivit...