SIMBAD references

2008ApJ...680..130C - Astrophys. J., 680, 130-142 (2008/June-2)

Mid-infrared properties and color selection for X-Ray-detected active galactic nuclei in the MUSYC Extended Chandra Deep Field-South.

CARDAMONE C.N., URRY C.M., DAMEN M., VAN DOKKUM P., TREISTER E., LABBE I., VIRANI S.N., LIRA P. and GAWISER E.

Abstract (from CDS):

We present the mid-infrared colors of X-ray-detected AGNs and explore mid-infrared selection criteria. Using a statistical matching technique, the likelihood ratio, over 900 IRAC counterparts were identified with a new MUSYC X-ray source catalog that includes ∼1000 published X-ray sources in the Chandra Deep Field-South and Extended Chandra Deep Field-South. Most X-ray-selected AGNs have IRAC spectral shapes consistent with power-law slopes, fν∝να, and display a wide range of colors, -2≤α≤2. Although X-ray sources typically fit to redder (more negative α) power laws than non-X-ray-detected galaxies, more than 50% do have flat or blue (galaxy-like) spectral shapes in the observed 3-8 µm band. Only a quarter of the X-ray-selected AGNs detected at 24 µm are well fit by featureless red power laws in the observed 3.6-24 µm, likely the subset of our sample whose infrared spectra are dominated by emission from the central AGN region. Most IRAC color selection criteria fail to identify the majority of X-ray-selected AGNs, finding only the more luminous AGNs, the majority of which have broad emission lines. In deep surveys, these color selection criteria select 10%-20% of the entire galaxy population and miss many moderate-luminosity AGNs.

Abstract Copyright:

Journal keyword(s): Infrared: Galaxies - Galaxies: Quasars: General - X-Rays: Galaxies

VizieR on-line data: <Available at CDS (J/ApJ/680/130): table1.dat>

Nomenclature: Table 1: [CUD2008] NNNN (Nos 1-1017).

Simbad objects: 1013

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