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arXiv 0912.4772astro-ph.HE
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4U 1901+03爆发过程的相位分辨光谱分析

Phase-resolved spectral analysis of 4U 1901+03 during its outburst

Ya-Juan Lei, Wei Chen, Jin-Lu Qu, Li-Ming Song, Shu Zhang, Yu Lu, Hao-Tong Zhang, Ti-Pei Li

摘要:

2003年2 - 7月,高质量X射线双星4U 1901+03在爆发过程中,其脉冲轮廓随X射线亮度和能量的变化而变化:随着亮度的降低,脉冲峰值由双峰变为单峰。本文对Rossi X射线定时探测器(RXTE)观测到的4U 1901+03的同时代相位分辨能谱进行了详细的分析。我们发现,连续谱和脉冲谱都是相位相关的。由脉冲谱得到的光学厚度一般大于由连续谱得到的光学厚度。Fe Ka发射线只在连续谱中被探测到,在脉冲谱中缺失。这表明Fe的发射起源于吸积盘,而不是中子星的表面。

英文摘要:

The high mass X-ray binary 4U 1901+03 was reported to have the pulse profile evolving with the X-ray luminosity and energy during its outburst in February-July 2003: the pulse peak changed from double to single along with the decreasing luminosity. We have carried out a detailed analysis on the contemporary phase-resolved energy spectrum of 4U 1901+03 as observed by Rossi X-ray Timing Explorer (RXTE). We find that, both the continuum and the pulse spectra are phase dependent. The optical depth derived from the pulse spectrum is in general larger than that from the continuum. Fe Ka emission line is only detected in the spectrum of the continuum and is missing in the pulse spectrum. This suggests an origin of Fe emission from the accretion disk but not the surface of the neutron star.

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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