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arXiv 1302.4448astro-ph.HE
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脉冲星和磁星的时间噪声与磁层转动惯量

Timing Noise in Pulsars and Magnetars and the Magnetospheric Moment of Inertia

David Tsang, Konstantinos N. Gourgouliatos

摘要:

我们研究了磁星和规则磁星的时间噪声,发现在B ~ 10^{12.5} G以上,存在一个强磁场依赖的时间噪声分量。定时噪声基底对磁场的依赖性也反映在最小的可观测毛刺大小中。我们发现,磁层扭矩的变化不能解释这个组成部分的定时噪声。我们计算的转动惯量的磁场外的中子星,并表明,这种定时噪声分量可能是由于这种转动惯量的变化,并可能是快速的全球磁层变化的证据。

英文摘要:

We examine timing noise in both magnetars and regular pulsars, and find that there exists a component of the timing noise with strong magnetic field dependence above B ~ 10^{12.5} G. The dependence of the timing noise floor on the magnetic field is also reflected in the smallest observable glitch size. We find that magnetospheric torque variation cannot explain this component of timing noise. We calculate the moment of inertia of the magnetic field outside of a neutron star and show that this timing noise component may be due to variation of this moment of inertia, and could be evidence of rapid global magnetospheric variability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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