Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-02
Astronomy and Astrophysics
Astrophysics
2 pages, 1 figure; Will appear in the "Spitzer: New Views on the Cosmos" November 2004 conference proceedings to be published
Scientific paper
We present analysis of spectral energy distributions (SEDs) from mid-infrared through X-ray of a sample of 420 hard X-ray selected, z-band and Spitzer/IRAC detected active galactic nuclei (AGN) and AGN candidates from the GOODS multiwavelength survey. We fit local empirical SED templates of both normal and active galaxies to the rest-frame luminosities calculated from spectroscopic (where available) and photometric redshifts. The majority of the optically stellar-dominated (with early-type galaxy fits) sources are moderately luminous (L_X,2-10 keV ~ 10^43 erg/s) hard X-ray sources with high X-ray hardness ratios (HR > 0.2), high MIR luminosities and red MIR colors in excess of a typical stellar dominated elliptical galaxy. These sources likely harbor heavily obscured (though Compton-thin) AGN. The observed ratio of obscured to unobscured AGN has an integrated mean of ~3.4:1 but declines with increasing redshift. This effect has been explained by Treister et al. (2004) as an observational bias triggered by the lack of spectroscopic redshifts at R > 24 which are predominantly higher redshift obscured sources.
AGN Team the GOODS
Chatzichristou Eleni
Duyne Jeffrey Van
Treister Ezequiel
Urry Meg C.
No associations
LandOfFree
Infrared Properties of AGN in the GOODS Fields: AGN in Stellar Dominated High-z Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Infrared Properties of AGN in the GOODS Fields: AGN in Stellar Dominated High-z Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared Properties of AGN in the GOODS Fields: AGN in Stellar Dominated High-z Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-24553