X-Ray Signatures of an Ionized Reprocessor in the Seyfert Galaxy Ton S180
X-Ray Signatures of an Ionized Reprocessor in the Seyfert Galaxy Ton S180
复制标题
Seyfert Galaxy Ton S180 中电离再处理器的 X 射线特征
DOI：
10.1086/306434
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Nandra
中科院分区：
文献类型：
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作者：
T. Turner;I. George;K. Nandra
在分析ASCA数据的基础上，讨论了Seyfert星系Ton S180的硬X射线性质。我们发现X射线通量在几千秒的时间尺度上变化了~2倍。该源在0.5-2 keV波段的变异幅度明显高于2-10 keV波段。在0.6-10 keV频带内，连续谱被充分参数化为Γ ~ 2.5幂律。我们证实了最近发现的高等效宽度的发射线，由于铁K壳发射高度电离的材料。这些ASCA数据显示Fe线轮廓是广泛的和不对称的，他们初步认为它是更强的X射线耀斑，这是一致的起源从吸积盘的内部。X射线光谱在2 keV以下是复杂的，可能是因为软X射线线的混合发射，这将支持电离后处理器的存在，最有可能是由于该源中相对较高的吸积率。
We discuss the hard X-ray properties of the Seyfert galaxy Ton S180 based on the analysis of ASCA data. We find the X-ray flux varied by a factor ~2 on a timescale of a few thousand seconds. The source showed a significantly higher amplitude of variability in the 0.5-2 keV band than in the 2-10 keV band. The continuum is adequately parameterized as a Γ ~ 2.5 power law across the 0.6-10 keV band. We confirm the recent discovery of an emission line of high equivalent width due to Fe K shell emission from highly ionized material. These ASCA data show the Fe line profile to be broad and asymmetric, and they tentatively suggest it is stronger during the X-ray flares, which is consistent with an origin from the inner parts of an accretion disk. The X-ray spectrum is complex below 2 keV, possibly because of emission from a blend of soft X-ray lines, which would support the existence of an ionized reprocessor most likely due to a relatively high accretion rate in this source.