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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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