NOAO >   Observing Info >   Approved Programs >   2001A-0175

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Proposal Information for 2001A-0175


PI: Kathleen Flint, UCO/Lick Observatory, flint@ucolick.org
Address: UCSC, Santa Cruz, CA 95064, USA

CoI: Mike Bolte, UCO/Lick Observatory
CoI: Claudia Oliveira, Instituto Astronomico e Geofisico, USP

Title: The Galaxy Luminosity Function in Nearby Groups

Abstract: The z=0 galaxy luminosity function is not well determined for M_R > -11 outside the Local Group. We have an ongoing program to measure the luminosity function in nearby groups, where we can probe the faint-end of the distribution to dwarf spheroidal magnitudes and surface brightnesses. We have over seven square degrees of R-band imaging with KPNO 0.9m+MOSAIC in the Leo I group and over 10 square degrees in the Coma I group. These images have provided a list of ~ 70 group member candidates per square degree, reaching to (mu)_R(0) ~ 24, R_T ~ 20. We propose to confirm membership of the higher-surface- brightness candidates with spectroscopic redshifts from WIYN+HYDRAB, where the multi-object capability and one-square-degree field is perfectly matched to our MOSAIC fields. To complement these observations, we also propose to obtain B-band photometry of our candidates with KPNO 2.1-m+T2KA, which will help determine morphology, and, for the lowest-surface-brightness candidates, discriminate against false-detections and high-z galaxy and cluster contamination.


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



NOAO >   Observing Info >   Approved Programs >   2001A-0175

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