NOAO >   Observing Info >   Approved Programs >   2003B-0304

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Proposal Information for 2003B-0304


PI: Prof. Jean Brodie, UCO/Lick Observatory, brodie@ucolick.org
Address: Dept. of Astronomy, University of California, 1156 High St., Santa Cruz, CA 95064, USA

CoI: Soeren Larsen, ESO-Garching
CoI: Jay Strader, UCO/Lick Observatory
CoI: Prof. John Huchra, Harvard-Smithsonian Center for Astrophysics

Title: Extragalactic Globular Clusters in the Near-IR: Hidden Markers of Galaxy Assembly?

Abstract: Tracing the major individual star-forming events that occur while the structure of the universe is assembling is an exciting and now realizable prospect provided globular cluster (GC) formation traces star formation and we can determine the ages and metallicities of sub- components in GC systems. Optical colors suffer from an age-metallicity degeneracy that can be lifted by a combination of optical and near-IR photometry. The relative numbers of young and old GCs are currently very poorly constrained from optical data alone, yet this ratio is essential for establishing whether galaxy assembly occurred predominantly at high or low redshift. We propose to use NIRI to obtain K-band data for two early-type galaxies, NGC 2865 and NGC 7457, believed to be recent merger remnants and good prospective hosts for young/intermediate age GC populations.


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