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A Possible \ensuremath\sim}20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-quiet Active Galactic Nucleus Ark 120}

TitleA Possible \ensuremath\sim}20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-quiet Active Galactic Nucleus Ark 120}
Publication TypeJournal Article
AuthorsLi, Y-R, Wang, J-M, Zhang, Z-X, Wang, K, Huang, Y-K, Lu, K-X, Hu, C, Du, P, Bon, E, Ho, LC
English