The Spectral Energy Distributions of Normal and Weakly-Active Galaxies

Details The Spectral Energy Distributions of Normal and Weakly-Active Galaxies The Spectral Energy Distributions of Normal and Weakly-Active Galaxies

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20914915p&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #149.15; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present radio to X-ray spectral energy distributions (SEDs) of over 1000 galaxies, which constitutes the largest (by at least a factor of 4) and most uniform multi-wavelength sample yet produced. We perform cross-matching of spectroscopically observed SDSS galaxies with surveys from radio (FIRST), IR (Spitzer and 2MASS), UV (GALEX) and X-ray (ROSAT and XMM-Newton Slew) that produce firm detections in FIRST, 2MASS and GALEX for 1117 galaxies. We provide a statistical analysis of the validity of the SDSS-ROSAT matches. Active galaxies (AGN) were identified based on the presence of strong emission lines in SDSS spectra, and sub-classified as H II, Seyfert, LINER or transition systems according to emission line ratios. The resulting multi-wavelength dataset contains an order of magnitude more actively line-emitting galaxies than any previous sample. We present individual and composite galaxy and AGN SEDs from which we can compute the bolometric luminosity of the central sources and estimate accretion rates for those sources.

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