Dying of the Light: An X-ray Fading Cold Quasar at z ~ 0.405

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dc.contributor.authorCooke, Kevin C.
dc.contributor.authorKirkpatrick, Allison
dc.contributor.authorEstrada, Michael
dc.contributor.authorMessias, Hugo
dc.contributor.authorPeca, Alessandro
dc.contributor.authorCappelluti, Nico
dc.contributor.authorAnanna, Tonima Tasnim
dc.contributor.authorBrewster, Jason
dc.contributor.authorGlikman, Eilat
dc.contributor.authorLaMassa, Stephanie
dc.contributor.authorLeung, T. K. Daisy
dc.contributor.authorTrump, Jonathan R.
dc.contributor.authorTurner, Tracey Jane
dc.contributor.authorUrry, C. Megan
dc.date.accessioned2021-01-26T18:13:05Z
dc.date.available2021-01-26T18:13:05Z
dc.date.issued2020-11-06
dc.description.abstractCold quasars are a rare subpopulation observed to host unobscured, X-ray luminous active galactic nuclei (AGN) while also retaining a cold gas supply fueling high star formation rates. These objects are interpreted as AGN early in their evolution. We present new SOFIA HAWC+ far-infrared observations, far-ultraviolet to far-infrared (FUV–FIR) photometry, and optical spectroscopy to characterize the accretion and star formation behavior in a cold quasar at z ~ 0.405 (CQ 4479). CQ 4479 is a starburst galaxy with a predominantly young stellar population and a high gas mass fraction of ~50%–70%. The AGN component has yet to become the dominant component of the FIR emission. We also find AGN bolometric luminosity that varies as a function of observation method and AGN region probed. Finally, we identify a candidate outflow feature corroborating the hypothesis that cold quasars have energetic feedback. This object presents an intriguing look into the early stages of AGN feedback and probes the rare phase where an AGN and cold gaseous component coexist.en_US
dc.description.sponsorshipWe thank the referee for constructive feedback that improved this work. Based in part on observations made with the NASA/DLR Stratospheric Observatory for Infrared Astronomy (SOFIA). SOFIA is jointly operated by the Universities Space Research Association, Inc. (USRA), under NASA contract NNA17BF53C, and the Deutsches SOFIA Institut (DSI) under DLR contract 50 OK 0901 to the University of Stuttgart. T.K.D.L acknowledges support from the Simons Foundation. Based on observations made with the NASA Galaxy Evolution Explorer. GALEX is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. This work is based (in part) on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. Based on data products from observations made with ESO Telescopes at the La Silla or Paranal Observatories under ESO program ID 179.A-2010. This research made use of Astropy, a communitydeveloped core Python package for Astronomy (Robitaille et al. 2013; Price-Whelan et al. 2018). This research made use of the iPython environment (Perez & Granger 2007) and the Python packages SciPy (Virtanen et al. 2020), NumPy (van der Walt et al. 2011), and Matplotlib (Hunter 2007). The authors wish to recognize and acknowledge this work was performed on the unceded traditional land of the Kaw, Kiikaapoi, Očhéthi Šakówiŋ, and Osage peoples. We also thank Wichahpi King for their generous advisement.en_US
dc.description.urihttps://iopscience.iop.org/article/10.3847/1538-4357/abb94aen_US
dc.description.urihttps://arxiv.org/abs/2009.08465
dc.format.extent10 pagesen_US
dc.genrejournal articles preprintsen_US
dc.identifierdoi:10.13016/m2chc7-lo0q
dc.identifier.citationKevin C. Cooke et al (2020), Dying of the Light: An X-Ray Fading Cold Quasar at z ~ 0.405, The Astrophysical Journal, Volume 903, Number 2, https://iopscience.iop.org/article/10.3847/1538-4357/abb94aen_US
dc.identifier.urihttp://hdl.handle.net/11603/20620
dc.language.isoen_USen_US
dc.publisherIOPen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Physics Department
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rights© 2020. The American Astronomical Society. All rights reserved.
dc.subjectactive galactic nucleien_US
dc.subjectinfrared excess galaxiesen_US
dc.subjectgalaxy evolutionen_US
dc.subjectgalaxy quenchingen_US
dc.subjectx-ray quasarsen_US
dc.titleDying of the Light: An X-ray Fading Cold Quasar at z ~ 0.405en_US
dc.typeTexten_US

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