Characterization of AGN and their hosts in the Extended Groth Strip: a multiwavelength analysis

Abstract

We have employed a reliable technique of classification of Active Galactic Nuclei (AGN) based on the fit of well-sampled spectral energy distributions (SEDs) with a complete set of AGN and starburst galaxy templates. We have compiled ultraviolet, optical, and infrared data for a sample of 116 AGN originally selected for their X-ray and mid-infrared emissions (96 with single detections and 20 with double optical counterparts). This is the most complete compilation of multiwavelength data for such a big sample of AGN in the Extended Groth Strip (EGS). Through these SEDs, we are able to obtain highly reliable photometric redshifts and to distinguish between pure and host-dominated AGN. For the objects with unique detection we find that they can be separated into five main groups, namely: Starburst-dominated AGN (24 % of the sample), Starburst-contaminated AGN (7 %), Type-1 AGN (21 %), Type-2 AGN (24 %), and Normal galaxy hosting AGN (24 %). We find these groups concentrated at different redshifts: Type-2 AGN and Normal galaxy hosting AGN are concentrated at low redshifts, whereas Starburst-dominated AGN and Type-1 AGN show a larger span. Correlations between hard/soft X-ray and ultraviolet, optical and infrared luminosities, respectively, are reported for the first time for such a sample of AGN spanning a wide range of redshifts. For the 20 objects with double detection the percentage of Starburst-dominated AGN increases up to 48%.

arXiv comment38 pages, 8 figures, 5 tables. Accepted by AJ

References in corpus (68)

• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Host Galaxies of AGN
• Modeling feedback from stars and black holes in galaxy mergers
• Lyman Break Galaxies at z>4 and the Evolution of the UV Luminosity Density at High Redshift
• Cosmological Evolution of the Hard X-ray AGN Luminosity Function and the Origin of the Hard X-ray Background
• A Physical Model for the Co-evolution of QSOs and of their Spheroidal Hosts
• Mid-Infrared Selection of Active Galaxies
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• Observational evidence for AGN feedback in early-type galaxies
• SWIRE: The SIRTF Wide-area InfraRed Extragalactic Survey
• Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey
• Luminosity-dependent evolution of soft X-ray selected AGN: New Chandra and XMM-Newton surveys
• The Mass Assembly History of Field Galaxies: Detection of an Evolving Mass Limit for Star Forming Galaxies
• The stellar mass assembly of galaxies from z=0 to z=4. Analysis of a sample selected in the rest-frame near-infrared with Spitzer
• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• The Chandra Deep Field South: Optical Spectroscopy I
• The distribution of absorbing column densities among Seyfert 2 galaxies
• The X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges
• Quasars, their host galaxies, and their central black holes
• Spitzer view on the evolution of star-forming galaxies from z=0 to z~3
• Deep Extragalactic X-ray Surveys
• The Cosmic Evolution of Hard X-ray Selected Active Galactic Nuclei
• The HELLAS2XMM survey. VII. The hard X-ray luminosity function of AGN up to z=4: more absorbed AGN at low luminosities and high redshifts
• The Chandra Deep Survey of the Hubble Deep Field North Area. II. Results from the Caltech Faint Field Galaxy Redshift Survey Area
• X-ray emission from radio-quiet quasars in the SDSS Early Data Release. The alpha_ox dependence upon UV luminosity
• Infrared power-law galaxies in the Chandra Deep Field South: AGN and ULIRGs
• The HELLAS2XMM survey: IV. Optical identifications and the evolution of the accretion luminosity in the Universe
• Soft X-ray and Ultraviolet Emission Relations in Optically Selected AGN Samples
• Unveiling obscured accretion in the Chandra Deep Field South
• AGN Host Galaxies at z~0.4-1.3 : Bulge-dominated and Lacking Merger-AGN Connection
• The Nature of the Hard X-ray Background Sources: Optical, Near-infrared, Submillimeter, and Radio Properties
• X-ray Observations of Optically-Selected, Radio-Quiet Quasars I: The ASCA results
• XMM-Newton observation of the Lockman Hole II. Spectral analysis
• Optical spectroscopy and X-ray detections of a sample of quasars and AGN selected in the mid-infrared from two Spitzer wide-area surveys
• Spitzer's Contribution to the AGN Population
• The IRAC Shallow Survey
• Spitzer Power-law AGN Candidates in the Chandra Deep Field-North
• The obscuration by dust of most of the growth of supermassive black holes
• The Chandra Deep Field-North Survey. XIV. X-ray detected Obscured AGNs and Starburst Galaxies in the Bright Submm Source Population
• An XMM-Newton hard X-ray survey of ULIRGs
• The DEEP Groth Strip Galaxy Redshift Survey. III. Redshift Catalog and Properties of Galaxies
• The VVDS type-1 AGN sample: The faint end of the luminosity function
• Unveiling a Population of X-ray Non-Detected AGN
• AEGIS: New Evidence Linking Active Galactic Nuclei to the Quenching of Star Formation
• AEGIS: Host Galaxy Morphologies of X-ray and Infrared-selected AGN at 0.2 < z < 1.2
• A deep Chandra observation of the Groth Strip. I. The X-ray data
• Photometric Redshift of X-Ray Sources in the Chandra Deep Field South
• Mid-infrared properties of X-ray sources in the Extended Groth Strip
• The Halpha-based Star Formation Rate Density of the Universe at z=0.84
• XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured Quasars
• The LBDS Hercules sample of mJy radio sources at 1.4 GHz - II. Redshift distribution, radio luminosity function, and the high-redshift cut-off
• ImpZ: a new photometric redshift code for galaxies and quasars
• Mid-infrared Properties and Color Selection for X-ray Detected AGN in the MUSYC ECDF-S field
• The X-ray Background and AGNs
• How are AGN Found?
• Exploring the evolutionary paths of the most massive galaxies since z~2
• Complete Multiwavelength Characterization of Faint Chandra X-ray Sources Seen in the Spitzer Wide-Area IR Extragalactic (SWIRE) Survey
• The Far-Infrared Spectral Energy Distributions of X-ray-selected Active Galaxies
• Evidence for a large fraction of Compton-thick quasars at high redshift
• XMM-Newton Surveys of the CFRS Fields - I: The Sub-mm/X-ray relation
• The nature of luminous X-ray sources with mid-infrared counterparts
• AEGIS: Radio and Mid-Infrared Selection of Obscured AGN Candidates
• Star formation histories from multi-band photometry: A new approach
• Formation and Evolution of Supermassive Black Holes in Galactic Centers: Observational Constraints
• Seyfert Galaxies and the Hard X-ray Background: Artificial Chandra Observations of z = 0.3 Active Galaxies
• The XMM-Newton Survey in the Marano Field I. The X-ray data and optical follow-up
• Searching for X-ray Luminous Starburst Galaxies
• On the use of photometric redshifts for X-ray selected AGNs

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• Spectroscopic identifications of Spitzer sources in the SWIRE/XMM-NEWTON/ELAIS-S1 field: a large fraction of Active Galactic Nuclei with high F(24micron)/F(R) ratio
• The Origins of a Rich Absorption Line Complex in a Quasar at Redshift 3.45
• Probing nuclear activity versus star formation at z~0.8 using near-infrared multi-object spectroscopy
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