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Coronal properties of black hole X-ray binaries in the hard state as seen by NuSTAR and Swift
Zhen Yan, Fu-guo Xie, Wenda Zhang
In this work, we measure two important phenomenological parameters of corona (and hot accretion flow) in black hole X-ray binaries: the photon index and the electron temperatur…
X-ray spectral shape variations in changing-look Seyfert galaxy SDSSJ155258+273728
Yanli Ai, Liming Dou, Chenwei Yang +7
We analyze the X-ray, optical, and mid-infrared data of a "changing-look" Seyfert galaxy \sdssj15 at . Over a period of one decade (2009 - 2018), its broad H line…
Radiative Properties of Magnetically-Arrested Disks
Fu-Guo Xie, Andrzej A. Zdziarski
Magnetically-arrested disks (MADs) appear when accretion flows are supplied with a sufficient amount of magnetic flux. In this work, we use results of magnetohydrodynamic simulatio…
Radio/X-ray Correlation in the Mini-Outburts of Black Hole X-ray Transient GRS 1739--278
Fu-Guo Xie, Zhen Yan, Zhongzu Wu
We present quasi-simultaneous radio and X-ray observations of the black hole X-ray binary GRS 1739--278 of its 2015-2016 mini-outbursts, i.e. between 2015 June 10 and 2016 October…
Resolving accretion flows in nearby active galactic nuclei with the Event Horizon Telescope
Bidisha Bandyopadhyay, Fu-Guo Xie, Neil M. Nagar +5
The Event Horizon Telescope (EHT), now with its first ever image of the photon ring around the supermassive black hole of M87, provides a unique opportunity to probe the physics of…