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arXiv 0710.1201astro-ph
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瞬态反常X射线脉冲星Xte J1810-197在X射线爆发期间的X射线光变曲线、脉冲射电辐射和自旋频率演化

On the X-Ray Light Curve, Pulsed-Radio Emission, and Spin Frequency Evolution of the Transient Anomalous X-Ray Pulsar Xte J1810--197 During its X-Ray Outburst

U. Ertan, M. H. Erkut

摘要:

我们证明:(i)瞬时AXP XTE J 1810 -197的长期X射线爆发光曲线可以用一个回退盘来解释,该回退盘在被软伽马射线暴加热后通过盘不稳定性向静止演变,(ii)该源在同一时期的自旋频率演变也可以用作用在中子星磁层上的盘扭矩来解释,(iii)最重要的是,最近观测到的来自该源的脉冲射电发射与X射线亮度最低的时期相吻合。这在回退盘模型中是很自然的,因为吸积功率变得如此之低,以至于不足以抑制XTE J1810-197的射束辐射。

英文摘要:

We show that: (i) the long-term X-ray outburst light curve of the transient AXP XTE J1810-197 can be accounted for by a fallback disk that is evolving towards quiescence through a disk instability after having been heated by a soft gamma-ray burst, (ii) the spin-frequency evolution of this source in the same period can also be explained by the disk torque acting on the magnetosphere of the neutron star, (iii) most significantly, recently observed pulsed-radio emission from this source coincides with the epoch of minimum X-ray luminosity. This is natural in terms of a fallback disk model, as the accretion power becomes so low that it is not sufficient to suppress the beamed radio emission from XTE J1810-197.

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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