A Survey of Mid-UV Morphology of Nearby Galaxies: Galaxy Structure and Faint Galaxy Evolution

Details A Survey of Mid-UV Morphology of Nearby Galaxies: Galaxy Structure and Faint Galaxy Evolution A Survey of Mid-UV Morphology of Nearby Galaxies: Galaxy Structure and Faint Galaxy Evolution

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8645w&link_type=abstract

HST Proposal ID #8645

Mathematics

Logic

Hst Proposal Id #8645 Galaxies

Scientific paper

Too little is known about the relation between star formation and the global physical characteristics of galaxies to interpret the morphologies of distant galaxies in terms of their evolutionary status. Faint galaxies are primarily observed by HST in their rest-frame mid-ultraviolet. They resemble nearby late-type galaxies, but are they really physically similar classes of objects? We propose to address this question through a WFPC2 imaging survey of 37 nearby galaxies in two mid-UV bands. Our sample is carefully selected for size and surface brightness and has a large amount of correlative data available. A wide range of Hubble types and inclinations is included, with emphasis on late- types/irregulars/peculiars. All objects have ground-based UBVRIJHK, and 15 have far-UV UIT images. The mid-UV is the missing keystone. Our proposed data set will be unique, can be applied to a wide range of problems, and will be made public immediately. Our goals are: 1. Consistently classify polychromatic structures and photometric properties of galaxies from 0.15-2.2 mu. 2. Map the spatial distribution, luminosities, and sizes of star-forming regions responsible for the UV morphology, and relate these to global galaxy properties. 3. Provide local benchmark images that we can redshift to z~1-->3 for quantitative comparison to the morphological and photometric properties of high redshift galaxies.

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