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arXiv 1204.2199astro-ph.HE
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PSRs B0531 +21、B1509-58和带有RXTE的B0540-69的X射线相位分辨光谱

X-ray Phase-Resolved Spectroscopy of PSRs B0531+21, B1509-58, and B0540-69 with RXTE

M. Y. Ge, F. J. Lu, J. L. Qu, S. J. Zheng, Y. Chen, D. W. Han

摘要:

罗西X射线计时探测器({ \sl RXTE})对三颗著名的年轻恒星(PSR)B 0531 +21(蟹状星云)、B1509-58和B 0540 -69进行了数百次观测。利用{ \sl RXTE}资料,我们详细研究了这些恒星的相位分辨光谱特性。与以往的研究相比,本文更精确、更详细地证实了PSR B 0531 +21的X射线谱随相位的变化:谱从第一个脉冲开始软化,在脉冲峰值处变硬,在桥底处最硬,然后逐渐软化,直到第二个峰值,然后迅速软化。与以往研究不同的是,我们发现PSR B1509-58的光谱在脉冲中心明显变硬,这也与PSR B 0531 +21的光谱形成对比。PSR B 0540 -69的X射线谱变化与PSR B 1509 -58相似,但显著性较低。利用近10年的观测数据,我们还研究了这些恒星的光谱的实时演化,没有发现明显的演化。讨论了这些结果对脉冲星X射线辐射理论模型的限制。

英文摘要:

The Rossi X-ray Timing Explorer ({\sl RXTE}) has made hundreds of observations on three famous young pulsars (PSRs) B0531+21 (Crab), B1509-58, and B0540-69. Using the archive {\sl RXTE} data, we have studied the phase-resolved spectral properties of these pulsars in details. The variation of the X-ray spectrum with phase of PSR B0531+21 is confirmed here much more precisely and more details are revealed than the previous studies: the spectrum softens from the beginning of the first pulse, turns to harden right at the pulse peak and becomes the hardest at the bottom of the bridge, softens gradually until the second peak, and then softens rapidly. Different from the previous studies, we found that the spectrum of PSR B1509-58 is significantly harder in the center of the pulse, which is also in contrast to that of PSR B0531+21. The variation of the X-ray spectrum of PSR B0540-69 seems similar to that of PSR B1509-58, but with a lower significance. Using the about 10 years of data span, we also studied the real time evolution of the spectra of these pulsars, and no significant evolution has been detected. We have discussed about the constraints of these results on theoretical models of pulsar X-ray emission.

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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