Disk evolution of the M87's nucleus observed in 2008

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 $\sim 0.5$M${}_{\odot }$ at that time.

arXiv comment14 pages, 6 figures, accepted by Research in Astronomy and Astrophysics

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Cited by in corpus (1)

• The year-scale X-ray variations in the core of M87