利用x射线观测探测NGC 6300的核和环核性质

A. Jana, A. Chatterjee, N. Kumari, P. Nandi, S. Naik, D. Patra
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引用次数: 6

摘要

我们介绍了2007年至2016年期间,利用{\it Suzaku}、{\it Chandra}和{\it NuSTAR}天文台的观测结果,对Seyfert 2星系NGC 6300进行了详细的x射线定时和光谱分析。我们计算了源在不同能量波段的方差、均方根分数变异性,并找到了不同能量波段的变异性。利用各种现象学和物理模型研究了光源的光谱特性。详细研究了康普顿云的性质、反射、fek $\alpha$线发射和软x射线过剩。提取和研究了源的几个物理参数,以确定它们之间是否存在任何相关性。我们还研究了环核“环面”的性质,发现环面不是均匀的,而是块状的。观测到的视距柱密度的变化可以用过境云来解释。在不同的观测历元中发现了不同的铁线发射区。我们还观察到,环面和核独立发展多年。
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Probing the nuclear and circumnuclear properties of NGC 6300 using X-ray observations
We present the results obtained from a detailed X-ray timing and spectral analysis of Seyfert 2 galaxy NGC 6300 by using observations with the {\it Suzaku}, {\it Chandra} and {\it NuSTAR} observatories between 2007 and 2016. We calculate variance, rms fractional variability of the source in different energy bands and find variabilities in various energy bands. Spectral properties of the source are studied by using various phenomenological and physical models. The properties of the Compton clouds, reflection, Fe K$\alpha$ line emission and soft X-ray excess are studied in detail. Several physical parameters of the source are extracted and investigated to establish the presence/absence of any correlation between them. We also investigate the nature of the circumnuclear `torus' and find that the torus is not uniform, rather clumpy. The observed changes in the line-of-sight column density can be explained in terms of transiting clouds. The iron line emitting region is found to be different in the different epoch of observations. We also observe that the torus and the nucleus independently evolve over the years.
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