SGRS AND AXPS AS MASSIVE FAST ROTATING HIGHLY MAGNETIZED WHITE DWARFS: THE CASE OF SGR 0418+5729

Kuantay Boshkayev, Jorge Armando Rueda, REMO J. RUFFINI

2015

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DOI 10.1142/9789814623995_0424
Data confidence 70 medium
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Abstract

We describe one of the so-called low magnetic field magnetars SGR 0418+5729, as a massive fast rotating highly magnetized white dwarf following Malheiro et. al. 2012. We give bounds for the mass, radius, moment of inertia, and magnetic field for these sources, by requesting the stability of realistic general relativistic uniformly rotating configurations. Based on these parameters, we improve the theoretical prediction of the lower limit of the spin-down rate of SGR 0418+5729. In addition, we compute the electron cyclotron frequencies corresponding to the predicted surface magnetic fields.