35 citations · 393 across the 31 of their papers we have counts for
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astro-ph.HE2020★ 1 cited
Disk evolution of the M87's nucleus observed in 2008
Fei Xiang, Cheng Cheng
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…
astro-ph.HE2016★ 7 cited
The clumpy torus around type II AGN as revealed by X-ray fluorescent lines
Jiren Liu, Yuan Liu, Xiaobo Li +3
The reflection spectrum of the torus around AGN is characterized by X-ray fluorescent lines, which are most prominent for type II AGN. A clumpy torus allows photons reflected from…
astro-ph.HE2013★ 4 cited
Evolution of Warped Accretion Disks in Active Galactic Nuclei. I. Roles of Feeding at the Outer Boundaries
Yan-Rong Li, Jian-Min Wang, Cheng Cheng +1
We investigate the alignment processes of spinning black holes and their surrounding warped accretion disks in a frame of two different types of feeding at the outer boundaries. We…