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| Paper: |
Characterizing Quasars in the Mid-IR |
| Volume: |
460, AGN Winds in Charleston |
| Page: |
126 |
| Authors: |
Hill, A. R.; Gallagher, S. C.; Deo, R. P. |
| Abstract: |
Following the Spitzer cold mission, we are in the position to try to
understand the general features of mid-IR spectra of quasars. To
that end, we have constructed a composite spectrum from 3.8-37.6
microns from 200 SDSS AGN with Spitzer IRS spectra. The high S/N
composite reveals significant features, including PAHs (associated
with star formation in the host galaxy), broad silicate bumps, and
narrow emission lines (including [O IV], [Ne V], [S III] and
others). Composites constructed from AGNs within luminosity bins
show systematic differences; we find that less luminous AGN show
redder continua, stronger PAH emission, and stronger narrow emission
lines. |
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