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.

14 pages, 6 figures, accepted by Research in Astronomy and Astrophysics

References in corpus (4)

• An Observational Determination of the Bolometric Quasar Luminosity Function
• Variable TeV emission as a manifestation of jet formation in M87?
• Accretion Disk Spectra of the Brightest Ultra-luminous X-ray Source in M82
• Spins of the supermassive black hole in M87: new constraints from TeV observations

Cited by in corpus (1)

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