238 citations · 3.8k across the 97 of their papers we have counts for
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Multi-wavelenth monitoring of the changing-look AGN NGC 2617 during state changes
V. L. Oknyansky, C. M. Gaskell, N. A. Huseynov +18
Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have th…
Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei
Jian-Min Wang, Pu Du, Michael S. Brotherton +5
Type 1 active galactic nuclei display broad emission lines, regarded as arising from photoionized gas moving in the gravitational potential of a supermassive black hole. The origin…
A Possible ~20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-Quiet Active Galactic Nucleus Ark 120
Yan-Rong Li, Jian-Min Wang, Zhi-Xiang Zhang +15
We study the long-term variability in the optical monitoring database of Ark~120, a nearby radio-quiet active galactic nucleus (AGN) at a distance of 143 Mpc (z=0.03271). We compil…
Hidden Broad-line Regions in Seyfert 2 Galaxies: from the spectropolarimetric perspective
Pu Du, Jian-Min Wang, Zhi-Xiang Zhang
The hidden broad-line regions (BLRs) in Seyfert 2 galaxies, which display broad emission lines (BELs) in their polarized spectra, are a key piece of evidence in support of the unif…
Unveiling slim accretion disc in AGN through X-ray and Infrared observations
Núria Castelló-Mor, Shai Kaspi, Hagai Netzer +7
In this work, which is a continuation of Castelló-Mor et al. (2016), we present new X-ray and infrared (IR) data for a sample of active galactic nuclei (AGN) covering a wide range…