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arXiv · 1211.4185

Braking PSR J1734-3333 with a possible fall-back disk

X. W. Liu·R. X. Xu·G. J. Qiao·J. L. Han·H. Tong
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Abstract

The very small braking index of PSR J1734-3333, $n=0.9\pm0.2$, challenges the current theories of braking mechanisms in pulsars. We present a possible interpretation that this pulsar is surrounded by a fall-back disk and braked by it. A modified braking torque is proposed based on the competition between the magnetic energy density of a pulsar and the kinetic energy density of a fall-back disk. With this torque, a self-similar disk can fit all the observed parameters of PSR J1734-3333 with natural initial parameters. In this regime, the star will evolve to the region having anomalous X-ray pulsars and soft gamma repeaters in the $P-\dot{P}$ diagram in about 20000 years and stay there for a very long time. The mass of the disk around PSR J1734-3333 in our model is about $10M_{\oplus}$, similar to the observed mass of the disk around AXP 4U 0142+61.

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X. W. Liu, R. X. Xu, G. J. Qiao, J. L. Han, H. Tong. 2012-11-18. Braking PSR J1734-3333 with a possible fall-back disk. https://doi.org/10.1088/1674-4527/14/1/007

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