5 papers
Strong X-ray Variability of I Zwicky 1: Obscuration from Clumpy Accretion-Disk Winds
Jian Huang, Bin Luo, W. N. Brandt +2
Obscuration from clumpy accretion-disk winds has been invoked to explain the extreme X-ray weakness and X-ray variability observed in a substantial fraction of super-Eddington accr…
A Rare Eddington-Limited, Heavily Obscured Low-Mass Active Galactic Nucleus Likely Triggered by a Galaxy Merger
Shouyi Wang, Fan Zou, Chang-Hao Chen +7
We report a detailed analysis of GAMA 376183, a powerful, heavily obscured active galactic nucleus (AGN) hosted by a low-mass galaxy () likely ex…
Systematic Monitoring of Extreme X-ray Variability from Weak-line Quasars
Madison Reich, W. N. Brandt, Bin Luo +4
We present the results of a multi-cycle Chandra program to systematically monitor the X-ray variability of 10 weak-line quasars (WLQs) that previously had limited multi-epoch X-ray…
On the Extremely X-ray Variable Active Galactic Nuclei in the XMM-LSS Field
Zijian Zhang, Bin Luo, Linhua Jiang +3
We present a systematic investigation of extremely X-ray variable active galactic nuclei (AGNs) in the XMM-SERVS XMM-LSS region. Eight variable AGNs are i…
Intervening nuclear obscuration changing the X-ray look of the QSO CFHQS J164121+375520
Fabio Vito, William Nielsen Brandt, Andrea Comastri +16
X-ray observations of the optically selected QSO CFHQS J164121+375520 (hereafter J1641) revealed that its flux dropped by a factor from 2018, when it was a bri…