Computer Science
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..296f&link_type=abstract
NOAO Proposal ID #2001A-0296
Computer Science
Scientific paper
We propose to obtain deep U-band imaging of a sample of bright southern spiral galaxies to complement our BVRJHK imaging of these same galaxies, and our VATT U-band imaging of our northern-sky sample. The proposed observations will be combined with our existing database to produce a digital library of images of a complete sample of bright spiral galaxies from 0.3 to 2.2(mu)m. Multiwavelength surveys of resolved galaxies are of great importance for investigations of their structure and stellar content, and the effects of scattering and absorption by dust. The variation in appearance of spiral arms, bars, and disks between 0.3 to 2.2 (micron) depends on the ages of these structures (young stars dominate the blue light whereas old stars dominate the near-IR) and will be valuable tests for theories of their formation and evolution. The images will be used to investigate the dependence of stellar content on position. The addition of U-band imaging to our current data set will dramatically improve the leverage on both stellar population studies of the youngest stars, and dust extinction and distribution studies. Such data are also invaluable for interpreting observations of galaxies at high redshift. For example, our proposed U-band observations will provide a sample to compare with NGST I-band observations of galaxies at z ~ 2.
Burg Claudia
Eskridge Paul
Frogel Jay. A.
Windhorst Rogier
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