SWIRE/SDSS quasars. II. Type 2 AGN (Hatziminaoglou+, 2009)

Details SWIRE/SDSS quasars. II. Type 2 AGN (Hatziminaoglou+, 2009) SWIRE/SDSS quasars. II. Type 2 AGN (Hatziminaoglou+, 2009)

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..73991206h&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/399/1206. Originally published in: 2009MNRAS.399.1206H

Computer Science

Qsos, Active Gal. Nuclei, Photometry: Infrared

Scientific paper

This paper is the second part of a work investigating the properties of dusty tori in active galactic nuclei (AGN) by means of multicomponent spectral energy distribution (SED) fitting. It focuses on low-luminosity, low-redshift (z<=0.25) AGN selected among emission line galaxies in the overlapping regions between Spitzer Wide-area Infrared Extragalactic Survey (SWIRE) and Sloan Digital Sky Survey Data Release 4 as well as X-ray, radio and mid-infrared selected type 2 AGN samples from the literature. The available multiband photometry covers the spectral range from the u band up to 160um. Using a standard chi2 minimization, the observed SED of each object is fit to a set of multicomponent models comprising a stellar component, a high optical depth (tau9.7>=1.0) torus and cold emission from a starburst (SB). The torus components assigned to the majority of the objects were those of the highest optical depth of our grid of models (tau9.7=10.0). The contribution of the various components (stars, torus, SB) is reflected in the position of the objects on the Infrared Array Camera (IRAC) colour diagram, with star-, torus- and SB-dominated objects occupying specific areas of the diagrams and composite objects lying in between.
(4 data files).

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