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Star formation in the hosts of high-z QSOs: Evidence from Spitzer PAH detections
D. Lutz, E. Sturm, L. J. Tacconi +7
We present Spitzer rest-frame mid-infrared spectroscopy of twelve z~2 mm-bright type 1 QSOs, selected from unlensed and lensed QSO samples and covering a range of AGN optical lumin…
Extended silicate dust emission in PG QSOs
M. Schweitzer, B. Groves, H. Netzer +9
This paper addresses the origin of the silicate emission observed in PG QSOs, based on observations with the Spitzer Space Telescope. Scenarios based on the unified model suggest t…
High-ionization mid-infrared lines as black hole mass and bolometric luminosity indicators in active galactic nuclei
K. M. Dasyra, L. C. Ho, L. Armus +6
We present relations of the black hole mass and the optical luminosity with the velocity dispersion and the luminosity of the [Ne V] and the [O IV] high-ionization lines in the mid…
Uncovering the Active Galactic Nuclei in Low-Ionization Nuclear Emission-Line Regions with Spitzer
David Rupke, Sylvain Veilleux, DongChan Kim +6
The impact of active galactic nuclei on low-ionization nuclear emission-line regions (LINERs) remains a vigorous field of study. We present preliminary results from a study of the…
Spitzer Quasar and ULIRG Evolution Study (QUEST): II. The Spectral Energy Distributions of Palomar-Green Quasars
Hagai Netzer, Dieter Lutz, Mario Schweitzer +10
This is the second paper studying the QSOs in the spitzer QUEST sample. Previously we presented new PAH measurements and argued that most of the observed far infrared (FIR) radiati…
Dust covering factor, silicate emission and star formation in luminous QSOs
R. Maiolino, O. Shemmer, M. Imanishi +4
We present Spitzer IRS low resolution, mid-IR spectra of a sample of 25 high luminosity QSOs at 2<z<3.5. When combined with archival IRS observations of local, low luminosity type-…