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arXiv · 1308.3011

Population synthesis of young isolated neutron stars: the effect of fallback disk accretion and magnetic field evolution

Lei Fu·Xiang-Dong Li
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Abstract

The spin evolution of isolated neutron stars (NSs) is dominatd by their magnetic fields. The measured braking indices of young NSs show that the spin-down mechanism due to magnetic dipole radiation with constant magnetic fields is inadequate. Assuming that the NS magnetic field is buried by supernova fallback matter and re-emerges after accretion stops, we carry out Monte-Carlo simulation of the evolution of young NSs, and show that most of the pulsars have the braking indices ranging from -1 to 3. The results are compatible with the observational data of NSs associated with supernova remnants. They also suggest that the initial spin periods of NSs might occupy a relatively wide range.

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Lei Fu, Xiang-Dong Li. 2013-08-14. Population synthesis of young isolated neutron stars: the effect of fallback disk accretion and magnetic field evolution. https://doi.org/10.1088/0004-637x/775/2/124

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