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…