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arXiv 1209.5871astro-ph.HE
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黑寡妇脉冲星PSR B1957 +20的X射线研究

X-ray studies of the Black Widow Pulsar PSR B1957+20

R. H. H. Huang, A. K. H. Kong, J. Takata, C. Y. Hui, L. C. C. Lin, K. S. Cheng

摘要:

我们报告的黑寡妇脉冲星,PSR B1957+20的钱德拉观测。通过对该脉冲星的深空观测,发现了脉冲星X射线辐射具有二元相位依赖性的证据。二元相分辨光谱分析揭示了PSR B 1957 +20的非热X射线发射,证实了以前的研究结果。这表明X射线主要是由于双星内的冲击发射造成的,当脉冲星风与伴星的烧蚀物质相互作用时,这种冲击发射最强。在我们的研究中确定的几何形状的峰值发射。非热X射线尾谱的边缘软化可能表明在终止激波处注入的粒子主要由同步辐射冷却控制。

英文摘要:

We report on Chandra observations of the black widow pulsar, PSR B1957+20. Evidence for a binary-phase dependence of the X-ray emission from the pulsar is found with a deep observation. The binary-phase resolved spectral analysis reveals non-thermal X-ray emission of PSR B1957+20, confirming the results of previous studies. This suggests that the X-rays are mostly due to intra-binary shock emission which is strongest when the pulsar wind interacts with the ablated material from the companion star. The geometry of the peak emission is determined in our study. The marginal softening of the spectrum of the non-thermal X-ray tail may indicate that particles injected at the termination shock is dominated by synchrotron cooling.

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