What Makes an AGN Red?

Details What Makes an AGN Red? What Makes an AGN Red?

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21333205k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #332.05; Bulletin of the American Astronomical Society, Vol. 41, p.393

Astronomy and Astrophysics

Astronomy

Scientific paper

We analyze the spectral energy distributions (SEDs) and emission line properties of the red (J-Ks > 2) 2MASS AGN using principle component analysis (PCA). The sample includes 44 low redshift AGN with low or moderate obscuration (N_H < 10^23 cm^-2). The obscuration of the AGN allows us to see weaker emission components (host galaxy emission, AGN scattered light) which are usually outshone by the AGN. The first four eigenvectors explain 70% of the variance in the sample. The dominant cause of variance in the sample (eigenvector 1) is the L/Ledd ratio strengthened by intrinsic absorption. Eigenvector 2 is related to host galaxy (relative to the observed AGN) emission and successive eigenvectors distinguish two sources of obscuration: host galaxy absorption and circumnuclear absorption.

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