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

Abstract

Cold 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, 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 co-exist.

10 pages, 8 figures, Published in ApJ 6-November-2020

References in corpus (24)

• The NumPy array: a structure for efficient numerical computation
• The Host Galaxies and Classification of Active Galactic Nuclei
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• COLD GASS, an IRAM Legacy Survey of Molecular Gas in Massive Galaxies: II. The non-universality of the Molecular Gas Depletion Timescale
• The Hard X-ray Spectrum as a Probe for Black-Hole Growth in Radio-Quiet Active Galactic Nuclei
• Quasar Broad Absorption Line Variability on Multi-Year Time Scales
• The X-Ray to Mid-Infrared Relation of AGN at High Luminosity
• The Sloan Digital Sky Survey Stripe 82 Imaging Data: Depth-Optimized Co-adds Over 300 Deg^2 in Five Filters
• The mean star formation rates of unobscured QSOs: searching for evidence of suppressed or enhanced star formation
• Spitzer Observations of Young Red Quasars
• CANDELS: Elevated Black Hole Growth in the Progenitors of Compact Quiescent Galaxies at z~2
• Evolution in the Black Hole - Galaxy Scaling Relations and the Duty Cycle of Nuclear Activity in Star-Forming Galaxies
• NuSTAR observations of WISE J1036+0449, a Galaxy at z$\sim 1$ obscured by hot dust
• AGN Populations in Large Volume X-ray Surveys: Photometric Redshifts and Population Types found in the Stripe 82X Survey
• Origins Space Telescope Mission Concept Study Report
• The first Super Massive Black Holes: indications from models for future observations
• A Sensitive Search For [NII] Emission in a z=6.4 Quasar Host Galaxy
• Molecular Gas Inflows and Outflows in Ultraluminous Infrared Galaxies at $z\sim 0.2$ and one QSO at $z=6.1$
• Peering through the dust II: $XMM-Newton$ observations of two additional FIRST-2MASS red quasars
• Tracing the co-evolution path of super massive black holes and spheroids with AKARI-selected ultra-luminous IR galaxies at intermediate redshifts

Cited by in corpus (6)

• Comprehensive Broadband X-ray and Multiwavelength Study of Active Galactic Nuclei in Local 57 Ultra/luminous Infrared Galaxies Observed with NuSTAR and/or Swift/BAT
• Morphology & Environment's Role on the Star Formation Rate -- Stellar Mass Relation in COSMOS from 0 < z < 3.5
• NuSTAR Non-detection of a Faint Active Galactic Nucleus in an Ultraluminous IR Galaxy with Kpc-scale Fast Wind
• Spectroscopic study of the [OIII]$\lambda$5007 profile in Seyfert 1 galaxies
• The [OIII] profiles of far-infrared active and non-active optically-selected green valley galaxies
• Cold Quasar Investigation: Comparing Star Formation Rates to Black Hole Growth