NOAO >   Observing Info >   Approved Programs >   2010A-0080

Small NOAO Logo

Proposal Information for 2010A-0080


PI: Jonathan R. Hargis, Indiana University, jhargis@astro.indiana.edu
Address: Department of Astronomy, 727 East Third Street, Bloomington, IN 47405, USA

CoI: Katherine Rhode, Indiana University

Title: Mosaic Imaging of Globular Cluster Systems in the Outer Regions of Elliptical Galaxies

Abstract: We propose to use the KP-4m and Mosaic camera to obtain wide-field images of nearby field and cluster elliptical galaxies, in order to study their globular cluster (GC) populations at large radii. Because any theory of how a galaxy formed and evolved must be consistent with the properties of the galaxy's GC system, accurate measurements of the \it global properties of a galaxy's GC system are crucial for understanding galaxy origins. Estimates of such fundamental properties as the total number of GCs, specific frequency, and color gradient are not well-known, largely because the GC population in massive galaxies can extend to many effective radii. Studies with smaller areal coverage observe only a small fraction of a galaxy's GC population, requiring large extrapolations to deduce the global GC system properties. Our proposed observations would allow us to study the GC populations of the targets to r ~ 100 kpc (~ 10-15 effective radii) and more than double the number of early-type galaxies with measurements of their global GC system properties.


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 >   2010A-0080

noaoprop-help@noao.edu

Small NOAO Logo