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arXiv 0705.2962astro-ph
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Cep X-4的回旋加速线

On the cyclotron line in Cep X-4

V. A. McBride, J. Wilms, I. Kreykenbohm, M. J. Coe, R. E. Rothschild, P. Kretschmar, K. Pottschmidt, J. Fisher, T. Hamson

摘要:

吸积型X射线天体为我们提供了研究极端引力场和磁场的实验室,因此对它们观测特性的准确描述有助于我们对这类天体的理解。我们的目标是检测的回旋共振散射功能在Be/X射线二进制Cep X-4和调查脉冲轮廓和光谱变化,通过爆发。利用光谱拟合和时间分析方法,对2002年6月爆发期间Cep X-4的性质进行了研究。之前宣布的30.7 keV回旋加速器特征得到证实,而该源显示出与之前爆发中观察到的光谱行为和光度相关变化类似的变化。长期X射线光变曲线在20.85 d处具有周期性,这可能与Be系统的轨道有关。

英文摘要:

Accreting X-ray pulsars provide us with laboratories for the study of extreme gravitational and magnetic fields, hence accurate descriptions of their observational properties contribute to our understanding of this group of objects. We aim to detect a cyclotron resonance scattering feature in the Be/X-ray binary Cep X-4 and to investigate pulse profile and spectral changes through the outburst. Spectral fitting and timing analysis are employed to probe the properties of Cep X-4 during an outburst in 2002 June. A previously announced cyclotron feature at 30.7 keV is confirmed, while the source shows spectral behaviour and luminosity related changes similar to those observed in previous outbursts. The long-term X-ray lightcurve shows a periodicity at 20.85 d, which could be attributed to the orbit in this Be system.

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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