Physics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11196e&link_type=abstract
HST Proposal ID #11196. Cycle 16
Physics
Scientific paper
At luminosities above 10^11.4 L_sun, the space density of far-infrared selected galaxies exceeds that of optically selected galaxies. These Luminous Infrared Galaxies LIRGs are primarily interacting or merging disk galaxies undergoing starbursts and creating/fueling central AGN. We propose far ACS/SBC/F140LP and near WFPC2/PC/F218W UV imaging of a sample of 27 galaxies drawn from the complete IRAS Revised Bright Galaxy Sample RBGS LIRGs sample and known, from our Cycle 14 B and I-band ACS imaging observations, to have significant numbers of bright 23 < B < 21 mag star clusters in the central 30 arcsec. The HST UV data will be combined with previously obtained HST, Spitzer, and GALEX images to i calculate the ages of the clusters as function of merger stage, ii measure the amount of UV light in massive star clusters relative to diffuse regions of star formation, iii assess the feasibility of using the UV slope to predict the far-IR luminosity and thus the star formation rate both among and within IR-luminous galaxies, and iv provide a much needed catalog of rest-frame UV morphologies for comparison with rest-frame UV images of high-z LIRGs and Lyman Break Galaxies. These observations will achieve the resolution required to perform both detailed photometry of compact structures and spatial correlations between UV and redder wavelengths for a physical interpretation our IRX-Beta results. The HST UV data, combined with the HST ACS, Spitzer, Chandra, and GALEX observations of this sample, will result in the most comprehensive study of luminous starburst galaxies to date.;
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