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ISBN: 978-0-7695-3507-4
pp: 10-13
Anomalous X-ray pulsars and Soft Gamma-ray repeaters are young pulsars with the dim radio emission, and they have been rapidly spun-down to the range from 5 to 12 s. Many experts proposed that they are neutron stars with ultra-strong magnetic fields ($\geq10^{14}$ G). From the modified spin down relation of pulsars$\dot{P}\propto P^{2-\rm n}$, we find that Vela pulsar would evolve into the classes of magnetars under some assumptions that pulsars lose its rotational energy only by magnetic dipole radiation and braking index is a constant. The evolution of inclination angle $\theta$ between pulsars' rotational and magnetic axes may be responsible for the increasing of magnetic field component. The results of Monte Carlo simulations show that a low braking index of $\rm n\sim 1.3-1.6$ can easily result in the formation of magnetars.
Wen-Cong Chen, "Monte Carlo Simulation for the Formation of Magnetars", CSIE, 2009, Computer Science and Information Engineering, World Congress on, Computer Science and Information Engineering, World Congress on 2009, pp. 10-13, doi:10.1109/CSIE.2009.193
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