Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability

15 Jun 2020 Guo Hengxiao DES Collaboration Burke Colin J. DES Collaboration Liu Xin DES Collaboration Phadke Kedar A. DES Collaboration Zhang Kaiwen DES Collaboration Chen Yu-Ching DES Collaboration Gruendl Robert A. DES Collaboration Lidman Christopher DES Collaboration Shen Yue DES Collaboration Morganson Eric DES Collaboration Aguena Michel DES Collaboration Allam Sahar DES Collaboration Avila Santiago DES Collaboration Bertin Emmanuel DES Collaboration Brooks David DES Collaboration Rosell Aurelio Carnero DES Collaboration Carollo Daniela DES Collaboration Kind Matias Carrasco DES Collaboration Costanzi Matteo DES Collaboration da Costa Luiz N. DES Collaboration De Vicente Juan DES Collaboration Desai Shantanu DES Collaboration Doel Peter DES Collaboration Eifler Tim F. DES Collaboration Everett Spencer DES Collaboration García-Bellido Juan DES Collaboration Gaztanaga Enrique DES Collaboration Gerdes David W. DES Collaboration Gruen Daniel DES Collaboration Gschwend Julia DES Collaboration Gutierrez Gaston DES Collaboration Hinton Samuel R. DES Collaboration Hollowood Devon L. DES Collaboration Honscheid Klaus DES Collaboration James David J. DES Collaboration Kuehn Kyler DES Collaboration Lima Marcos DES Collaboration Maia Marcio A. G. DES Collaboration Menanteau Felipe DES Collaboration Miquel Ramon DES Collaboration Möller Anais DES Collaboration Ogando Ricardo L. C. DES Collaboration Palmese Antonella DES Collaboration Paz-Chinchón Francisco DES Collaboration Plazas Andrés A. DES Collaboration Romer Anita K. DES Collaboration Roodman Aaron DES Collaboration Sanchez Eusebio DES Collaboration Scarpine Vic DES Collaboration Schubnell Michael DES Collaboration Serrano Santiago DES Collaboration Smith Mathew DES Collaboration Soares-Santos Marcelle DES Collaboration Sommer Natalia E. DES Collaboration Suchyta Eric DES Collaboration Swanson Molly E. C. DES Collaboration Tarle Gregory DES Collaboration Tucker Brad E. DES Collaboration Varga Tamas N. DES Collaboration

We report the identification of a low-mass AGN, DES J0218$-$0430, in a redshift $z = 0.823$ galaxy in the Dark Energy Survey (DES) Supernova field. We select DES J0218$-$0430 as an AGN candidate by characterizing its long-term optical variability alone based on DES optical broad-band light curves spanning over 6 years... (read more)

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  • ASTROPHYSICS OF GALAXIES