activity
20162026
most citedSupermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX 10 New Observations of Reverberation Mapping and Shortened H Lags

204 citations · 1.3k across the 39 of their papers we have counts for

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Showing 2017 · astro-ph.HEShow all

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astro-ph.HE2017★ 51 cited

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…