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Proposal Information for 2003A-0305


PI: Scott Croom, Anglo-Australian Observatory, scroom@aaoepp.aao.gov.au
Address: Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia

CoI: Steve Warren, Imperial College
CoI: Pat Hall, Princeton/Universidad Catolica de Chile
CoI: Michael Brown, NOAO
CoI: Arjun Dey, NOAO
CoI: Richard Green, NOAO/KPNO
CoI: Buell Jannuzi, NOAO
CoI: Malcolm Smith, NOAO/CTIO
CoI: Glenn Tiede, University of Florida

Title: A Deep Wide-Field Infrared Survey for QSOs

Abstract: We propose the first deep wide-field infrared-selected survey for QSOs. The purpose is to determine the contribution of QSOs to the universal energy budget over the optical-infrared window as a function of cosmic time. A fuller census of accreting objects must include the impact of dust in the host galaxy, possibly associated with accompanying starburst activity, and in the circumnuclear torus. We are using the unique optical and IR deep imaging data provided by the 18 sq. deg. NOAO Deep Wide-Field Survey (filters, Bw, R, I, J, H, K). We request 3 nights with WIYN/Hydra in order to obtain spectroscopic identifications in a 2 sq. deg. subfield of the NDWFS. By using the K-excess (KX) method we will select a complete sample of QSOs, flux limited in the K- band, that is minimally affected by dust extinction or by intrinsically red continuum slopes. These spectra of ~100 QSOs will be used to refine our selection criteria prior to more complete follow-up. These data will also enable initial progress toward our survey aims, namely, to i) compare the completeness of UVX and KX samples, ii) detect a complete sample of QSOs in the redshift desert 2.5<z<3.2, iii) determine the fraction of red QSOs, iv) measure the K-band luminosity function of QSOs to z=4.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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