The Biases of Optical Line-Ratio Selection for Active Galactic Nuclei, and the Intrinsic Relationship between Black Hole Accretion and Galaxy Star Formation

Abstract

We use 317,000 emission-line galaxies from the Sloan Digital Sky Survey to investigate line-ratio selection of active galactic nuclei (AGNs). In particular, we demonstrate that "star formation dilution" by HII regions causes a significant bias against AGN selection in low-mass, blue, star-forming, disk-dominated galaxies. This bias is responsible for the observed preference of AGNs among high-mass, green, moderately star-forming, bulge-dominated hosts. We account for the bias and simulate the intrinsic population of emission-line AGNs using a physically-motivated Eddington ratio distribution, intrinsic AGN narrow line region line ratios, a luminosity-dependent Lbol/L[OIII] bolometric correction, and the observed Mbh-sigma relation. These simulations indicate that, in massive (log(M*/Msun) > 10) galaxies, AGN accretion is correlated with specific star formation rate but is otherwise uniform with stellar mass. There is some hint of lower black hole occupation in low-mass (log(M*/Msun) < 10) hosts, although our modeling is limited by uncertainties in measuring and interpreting the velocity dispersions of low-mass galaxies. The presence of star formation dilution means that AGNs contribute little to the observed strong optical emission lines (e.g., [OIII] and Ha) in low-mass and star-forming hosts. However the AGN population recovered by our modeling indicates that feedback by typical (low- to moderate-accretion) low-redshift AGNs has nearly uniform efficiency at all stellar masses, star formation rates, and morphologies. Taken together, our characterization of the observational bias and resultant AGN occupation function suggest that AGNs are unlikely to be the dominant source of star formation quenching in galaxies, but instead are fueled by the same gas which drives star formation activity.

ApJ accepted. 36 pages, 33 figures. Figs 17 & 18 (page 20) are the money plots

References in corpus (33)

• Cosmic Star Formation History
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Host Galaxies and Classification of Active Galactic Nuclei
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• UV Star Formation Rates in the Local Universe
• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• Advection-Dominated Accretion and the Black Hole Event Horizon
• Radiatively Inefficient Accretion in Nearby Galaxies
• AEGIS: The color-magnitude relation for X-ray selected AGN
• New insights into the stellar content and physical conditions of star-forming galaxies at z = 2-3 from spectral modelling
• The MOSDEF Survey: Excitation Properties of $z\sim 2.3$ Star-forming Galaxies
• Merging and Clustering of the Swift BAT AGN Sample
• AGN Emission Line Diagnostics and the Mass-Metallicity Relation up to Redshift z~2: the Impact of Selection Effects and Evolution
• Metallicities and Physical Conditions in Star-forming Galaxies at z~1.0-1.5
• The Evolution of AGN Host Galaxies: From Blue to Red and the Influence of Large-Scale Structures
• Quasars Are Not Light-Bulbs: Testing Models of Quasar Lifetimes with the Observed Eddington Ratio Distribution
• The MOSDEF Survey: Optical AGN Diagnostics at z~2.3
• The metallicity of the most distant quasars
• X-ray constraints on the local supermassive black hole occupation fraction
• Widespread and Hidden Active Galactic Nuclei in Star-Forming Galaxies at Redshift > 0.3
• The role of AGN in the colour transformation of galaxies at redshifts z~1
• Imprints of galaxy evolution on H ii regions Memory of the past uncovered by the CALIFA survey
• AEGIS: Demographics of X-ray and Optically Selected AGNs
• Evolution in the Black Hole - Galaxy Scaling Relations and the Duty Cycle of Nuclear Activity in Star-Forming Galaxies
• Thermal and radiative AGN feedback have a limited impact on star formation in high-redshift galaxies
• HST Emission Line Galaxies at z ~ 2: The Mystery of Neon
• Properties of Galaxies Hosting X-ray Selected Active Galactic Nuclei in the Cl1604 Supercluster at z=0.9
• No More Active Galactic Nuclei in Clumpy Disks Than in Smooth Galaxies at z~2 in CANDELS / 3D-HST

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