Disk evolution of the M87's nucleus observed in 2008
Disk evolution of the M87's nucleus observed in 2008
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2008 年观测到的 M87 核盘演化
DOI：
10.1088/1674-4527/20/7/101
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发表时间：
2020
影响因子：
1.8
通讯作者：
Cheng Cheng
中科院分区：
文献类型：
--
作者：
Xiang Fei;Cheng Cheng
通过重新分析2007 - 2008年钱德拉天文台的8个观测数据，发现了M87核区的年尺度X射线变化。对X射线能谱进行了拟合，并将其分解为盘状和耀斑成分。这种年尺度的X射线变化可以用一个简单的星团吸积模型很好地解释。我们的结论是，M87中心的超大质量黑洞当时正在吸积一个10.5M的星云。
We report the discovery of year-scale X-ray variation in the nuclear region of the M87 by reanalyze the eight Chandra observations from 2007 to 2008. The X-ray spectra are fitted and decomposed into disk and flaring components. This year-scale X-ray variability can be explained quite well by a simple clumpy accretion model. We conclude that the central super-massive black hole of M87 was accreting a cloud of∼ 0.5 M⊙ at that time.