47 citations · 126 across the 22 of their papers we have counts for
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astro-ph.GA2023★ 7 cited
Extreme Variability Quasars in Their Various States. II: Spectral Variation Revealed with Multi-epoch Spectra
Wenke Ren, Junxian Wang, Zhenyi Cai +1
We previously built a sample of 14,012 extremely variable quasars (EVQs) based on SDSS and Pan-STARRS1 photometric observations. In this work we present the spectral fitting to the…
astro-ph.GA2023★ 15 cited
How can the optical variation properties of active galactic nuclei be unbiasedly measured?
Xu-Fan Hu, Zhen-Yi Cai, Jun-Xian Wang
The variability of active galactic nuclei (AGNs) is ubiquitous but has not yet been understood. Measuring the optical variation properties of AGNs, such as variation timescale and…
astro-ph.GA2023★ 25 cited
A universal average spectral energy distribution for quasars from optical to extreme ultraviolet
Zhen-Yi Cai, Jun-Xian Wang
The well-known anti-correlation between the optical/ultraviolet (UV) emission line equivalent widths of active galactic nuclei and the continuum luminosity (the so-called Baldwin e…