A Transient "Changing-look" Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data

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dc.contributor.authorZeltyn, Grisha
dc.contributor.authorTrakhtenbrot, Benny
dc.contributor.authorEracleous, Michael
dc.contributor.authorRunnoe, Jessie
dc.contributor.authorTrump, Jonathan R.
dc.contributor.authorStern, Jonathan
dc.contributor.authorShen, Yue
dc.contributor.authorHernandez-Garcia, Lorena
dc.contributor.authorBauer, Franz E.
dc.contributor.authorYang, Qian
dc.contributor.authorDwelly, Tom
dc.contributor.authorRicci, Claudio
dc.contributor.authorGreen, Paul
dc.contributor.authorAnderson, Scott F.
dc.contributor.authorAssef, Roberto J.
dc.contributor.authorGuolo, Muryel
dc.contributor.authorMacLeod, Chelsea
dc.contributor.authorDavis, Megan C.
dc.contributor.authorFries, Logan
dc.contributor.authorGezari, Suvi
dc.contributor.authorGrogin, Norman A.
dc.contributor.authorHoman, David
dc.contributor.authorKoekemoer, Anton M.
dc.contributor.authorKrumpe, Mirko
dc.contributor.authorLaMassa, Stephanie
dc.contributor.authorLiu, Xin
dc.contributor.authorMerloni, Andrea
dc.contributor.authorMartinez-Aldama, Mary Loli
dc.contributor.authorSchneider, Donald P.
dc.contributor.authorTemple, Matthew J.
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorIbarra-Medel, Hector
dc.contributor.authorBurke, Jamison
dc.contributor.authorPellegrino, Craig
dc.contributor.authorKollmeier, Juna A.
dc.date.accessioned2025-01-20T21:01:31Z
dc.date.available2025-01-20T21:01:31Z
dc.date.issued2022
dc.description.abstractWe report the discovery of a new "changing-look" active galactic nucleus (CLAGN) event, in the quasar SDSS J162829.17+432948.5 at z = 0.2603, identified through repeat spectroscopy from the fifth Sloan Digital Sky Survey (SDSS-V). Optical photometry taken during 2020-2021 shows a dramatic dimming of Delta g approximate to 1 mag, followed by a rapid recovery on a timescale of several months, with the less than or similar to 2 month period of rebrightening captured in new SDSS-V and Las Cumbres Observatory spectroscopy. This is one of the fastest CLAGN transitions observed to date. Archival observations suggest that the object experienced a much more gradual dimming over the period of 2011-2013. Our spectroscopy shows that the photometric changes were accompanied by dramatic variations in the quasar-like continuum and broad-line emission. The excellent agreement between the pre- and postdip photometric and spectroscopic appearances of the source, as well as the fact that the dimmest spectra can be reproduced by applying a single extinction law to the brighter spectral states, favor a variable line-of-sight obscuration as the driver of the observed transitions. Such an interpretation faces several theoretical challenges, and thus an alternative accretion-driven scenario cannot be excluded. The recent events observed in this quasar highlight the importance of spectroscopic monitoring of large active galactic nucleus samples on weeks-to-months timescales, which the SDSS-V is designed to achieve.
dc.fuente.origenWOS
dc.identifier.doi10.3847/2041-8213/ac9a47
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttps://doi.org/10.3847/2041-8213/ac9a47
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92902
dc.identifier.wosidWOS:000878397300001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal letters
dc.rightsacceso restringido
dc.titleA Transient "Changing-look" Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data
dc.typeartículo
dc.volumen939
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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