What Makes an AGN Red?
Abstract
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.
- Publication:
-
American Astronomical Society Meeting Abstracts #213
- Pub Date:
- January 2009
- Bibcode:
- 2009AAS...21333205K