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arXiv 1306.5214astro-ph.SRastro-ph.HE
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射电望远镜和磁星中的毛刺恢复

Glitch recoveries in radio-pulsars and magnetars

Brynmor Haskell, Danai Antonopoulou

摘要:

脉冲星的故障是一个稳定自旋的中子星的自旋频率突然增加。这些事件被认为是对恒星内部超流体动力学的直接探测。然而,毛刺可以彼此显着不同,不仅在大小和频率上,而且在恒星的毛刺后响应上也是如此。有些表现为频率上的简单阶跃,而另一些则在故障后显示出降速速率的增加。其他人仍然表现出几个指数放松的组成部分,在故障后恢复。我们表明,如果故障确实是由于大规模unpinning的超流涡,在不同的地区,这发生在各自的时间尺度上,他们重新耦合可以导致各种观察到的签名。此外,我们表明,这个框架自然占异常X射线脉冲星的毛刺的特殊松弛。

英文摘要:

Pulsar glitches are sudden increases in the spin frequency of an otherwise steadily spinning down neutron star. These events are thought to represent a direct probe of the dynamics of the superfluid interior of the star. However glitches can differ significantly from one another, not only in size and frequency, but also in the post-glitch response of the star. Some appear as simple steps in frequency, while others also display an increase in spin-down rate after the glitch. Others still show several exponentially relaxing components in the post-glitch recovery. We show that if glitches are indeed due to large scale unpinning of superfluid vortices, the different regions in which this occurs and respective timescales on which they recouple can lead to the various observed signatures. Furthermore we show that this framework naturally accounts for the peculiar relaxations of glitches in Anomalous X-ray Pulsars.

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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