NOAO >   Observing Info >   Approved Programs >   2003A-0162

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Proposal Information for 2003A-0162


PI: William C. Keel, University of Alabama, keel@bildad.astr.ua.edu
Address: Physics Department, Box 870324, Tuscaloosa, AL 35487-0324, USA

CoI: Lisa Frattare, Space Telescope Science Institute

Title: Star Clusters and H II Regions in Interacting Galaxies

Abstract: It has long been established that star formation can be enhanced during galaxy encounters, and that some of this star formation happens in super star clusters (SSCs). We propose H(alpha) imaging of interacting galaxies with HST archival imagery, to compare the cluster locations and luminosities in the continuum and H(alpha). The combination of data can be especially powerful, allowing for a more accurate decomposition of blended emission regions than possible from ground-based imaging alone, and strengthening the use of the H(alpha) data to probe younger age ranges than possible using optical colors alone. The results will tell us how much of the star formation happens in these clusters, and is sensitive to a longer time baseline for establishing the history of both the rate and location of star formation during interactions.


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 >   2003A-0162

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