Among a dozen known magnetar-candidates there are no binary objects. As an estimate of a fraction of binary neutron stars is about 10% it is reasonable to address the question of solitarity of magnetars, to estimate theoretically the fraction of binary objects among them, and to mark out the most probable companions. We present population synthesis calculations of binary systems. Our goal is to...

ABSTRACT The origin and fate of magnetars [young, extremely magnetized neutron stars (NSs)] remains unsolved. Probing their evolution is therefore crucial for investigating possible links to other species isolated NSs, such as the X-ray dim NSs (XDINSs) rotating radio transients (RRATs). Here, we investigate spin magnetars. Two avenues are considered: one with exponentially decaying B-fields, s...

The modification of the rotating vector model in case magnetars are calculated. Magnetars may have twisted magnetic field compared with normal pulsars. polarization position angle will change a field. For dipole field, we found that both vertically and horizontally. During untwisting process magnetar magnetosphere, modifications evolve time monotonously. This explain evolution PSR J1622-4950 XT...

Possible origins of the magnetic fields of neutron stars include inheritance from the main sequence progenitor and dynamo action at some stage of evolution of progenitor. Inheritance is not sufficient to explain the fields of magnetars. Energetic considerations point to differential rotation in the final stages of core collapse process as the most likely source of field generation, at least for...