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

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Abstract

The very small braking index of PSR J1734-3333, n = 0.9 ± 0.2, 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 the pulsar and the kinetic energy density of the fall-back disk. With this torque, a self-similar disk can fit all the observed parameters of PSR J1734-3333 with natural initial values of parameters. In this regime, the star will evolve to the region having anomalous X-ray pulsars and soft gamma repeaters in the P- diagram in about 20 000 years and stay there for a very long time. The mass of the disk around PSR J1734-3333 in our model is about 10M⊕, similar to the observed mass of the disk around AXP 4U 0142+61. © 2014 National Astronomical Observatories of Chinese Academy of Sciences and IOP Publishing Ltd.

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APA

Liu, X. W., Xu, R. X., Qiao, G. J., Han, J. L., & Tong, H. (2014). Braking PSR J1734-3333 with a possible fall-back disk. Research in Astronomy and Astrophysics, 14(1), 85–92. https://doi.org/10.1088/1674-4527/14/1/007

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