NOAO >   Observing Info >   Approved Programs >   2009B-0534

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Proposal Information for 2009B-0534


PI: Susan Ridgway, CTIO/NOAO, seridgway@ctio.noao.edu
Address: NOAO Gemini Science Center, Colina El Pino s/n, Casilla 603, La Serena, Chile

CoI: Mark Lacy, California Institute of Technology
CoI: Tanya Urrutia, California Institute of Technology
CoI: Andreea Petric, California Institute of Technology

Title: Near-infrared spectroscopy of high redshift obscured quasars

Abstract: Dust obscured quasars may form the ``missing link'' between starbursts and normal quasars, and their numbers and characteristics at z~ 2-3, where both massive galaxies and quasars are building up most of their mass, are important to pin down. We have tentative evidence from optical spectroscopy of mid-IR selected obscured quasars that obscured objects significantly outnumber unobscured ones at these redshifts, but our spectroscopic completeness is low. We propose to use NIRI to obtain spectroscopy of candidate z>2 dust obscured quasars for which we have attempted to obtain spectroscopic redshifts in the optical, but for which we have only tentative redshifts based on low signal-to-noise emission line detections, or no emission lines at all.


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NOAO >   Observing Info >   Approved Programs >   2009B-0534

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