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引用次数: 1
摘要
本文介绍了用Suzaku卫星观测到的中极人马座V1223的Fe - k - α发射谱线。光谱用吸收热轫致辐射谱和Fe - k - α谱的三个分量的三个高斯谱来建模。我们解析了中性或低电离(6.41keV),类he (6.70keV)和类h (7.00keV)铁谱线。我们还获得了25 keV的热连续温度,这支持了从白矮星和激波锋面之间的激波加热气体层观察到的硬x射线的热起源。因此,我们认为类he线和类h线来自于碰撞等离子体。在Fe - k - α荧光谱线的起源上,我们发现它可能部分来自白矮星表面的硬x射线反射和N - H吸收柱。我们还讨论了Fe - k - α发射线作为探测某些天体物理点的可靠工具。
THE FE Kα EMISSION LINE OF INTERMEDIATE POLAR V1223 SAGITTARII
We present measurements of the Fe Kα emission line of the intermediate polar V1223 Sagittarii observed with the Suzaku satellite. The spectrum is modeled with an absorbed thermal bremsstrahlung spectrum and three Gaussians for the three components of the Fe Kα lines. We resolve the neutral or low-ionized (6.41keV), He-like (6.70keV), and H-like (7.00keV) iron lines. We also obtain a thermal continuum temperature of 25 keV, which supports a thermal origin of the hard X-rays observed from the shock heated layers of gas between the white dwarf and the shock front. Hence, we believe that the He-like and H-like lines are from the collisional plasma. On the origin of the Fe Kα fluorescence line, we find that it could be partly from reflections of hard X-rays from the white dwarf surface and the N H absorption columns. We also discuss the Fe Kα emission line as veritable tool for the probe of some astrophysical sites.
期刊介绍:
JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.