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arXiv · 2002.09122

Disk evolution of the M87's nucleus observed in 2008

Fei Xiang·Cheng Cheng
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Abstract

We report the discovery of year-scale X-ray variation in the nuclear region of the M87 by reanalyzing the 8 Chandra observations from 2007 to 2008. The X-ray spectra are fitted and decomposed into the 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 the M87 was accreting a cloud of $\sim0.5$M$_\odot$ at that time.

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Fei Xiang, Cheng Cheng. 2020-02-21. Disk evolution of the M87's nucleus observed in 2008. https://doi.org/10.1088/1674-4527/20/7/101

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