High-Resolution Imaging of Nearby Lyman Break Galaxy Analogs in the GALEX All-Sky Survey

Details High-Resolution Imaging of Nearby Lyman Break Galaxy Analogs in the GALEX All-Sky Survey High-Resolution Imaging of Nearby Lyman Break Galaxy Analogs in the GALEX All-Sky Survey

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10920h&link_type=abstract

HST Proposal ID #10920. Cycle 15

Computer Science

Scientific paper

We have used the ultraviolet all-sky imaging survey currently being conducted by the Galaxy Evolution Explorer GALEX to identify for the first time a rare population of low-redshift starbursts with properties remarkably similar to high-redshift Lyman Break Galaxies. These compact UV luminous galaxies UVLGs resemble Lyman Break Galaxies in terms of size, UV luminosity, star-formation rate, surface brightness, mass, metallicity, kinematics, dust content, and color. They have characteristic ``ages'' stellar mass/SFR of only a few hundred Myr. This population of galaxies is thus worthy of study in its own right and as a sample of local analogs of Lyman Break Galaxies. We propose to image a sample of the 9 nearest and brightest compact UVLGs in the near-ultraviolet, near-infrared, and H-alpha using ACS. With these images we will 1 characterize their structure and morphology, 2 look for signs of interactions and mergers, 3 investigate the distribution and propogation of star formation over varying time scales, and 4 quantify the stellar populations and star formation history, in order to determine whether a previous generation of stars formed long before the current burst. These data will perfectly complement our existing Spitzer, GALEX, and SDSS data, and will provide important information on star-formation in the present-day universe as well as shed light on the earliest major episodes of star formation in high-redshift galaxies.

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