NOAO >   Observing Info >   Approved Programs >   2009A-0416

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Proposal Information for 2009A-0416


PI: Susan Ridgway, CTIO, seridgway@ctio.noao.edu
Address: NGSC, Casilla 603, La Serena, Chile

CoI: Mark Lacy, SIRTF, Caltech

Title: Deep rest-frame optical imaging of Type 2 quasar host galaxies

Abstract: We wish to observe the host galaxies of three highly luminous, dust obscured quasars with laser guide star adaptive optics on Gemini. These z~ 2 objects, discovered in Spitzer Surveys, are the obscured equivalents of the objects which constitute the peak in the cosmic quasar number density. As these quasars are obscured by dust, the nuclear emission should be much reduced even in the near-infrared, making it much easier to image the host than for normal quasars of similar redshift and bolometric luminosity. The high spatial resolution of the AO/LGS system will allow us to resolve any signs of merger activity in the host galaxy (tidal tails, starforming knots) and allow us to accurately model the host galaxy and determine whether it is better represented by a bulge or disk. Comparison with existing data on normal quasar hosts at this redshift will also help us understand if these obscured objects are at an earlier phase in their quasar activity.


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NOAO >   Observing Info >   Approved Programs >   2009A-0416

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