Physics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6556l&link_type=abstract
HST Proposal ID #6556
Physics
Hst Proposal Id #6556 Cosmology
Scientific paper
We are studying the evolution of normal galaxies over the last two-thirds of the age of the Universe through HST imaging of fields from our deep CFRS and LDSS redshift surveys. In Cycle 6, we propose to obtain B-band images of a large sample of field galaxies with measured redshifts 0 < z < 1.3 that will have been observed in the I-band in Cycle 5. The B-band images are required to {a} separate the colors of bulge and disk components in regular symmetric galaxies; {b} determine the nature of individual components identified within more irregular or asymmetric galaxies; {c} search for compact blue nuclei in lower z objects where there is evidence for high ionization line spectra; {d} determine the colors of faint companions to study the role of intereactions in triggering star-formation; and {e} construct an atlas of far-ultraviolet morphologies of galaxies that may be used to interpret the very deepest HST images. The B-band data is essential for studying the star-formation histories of the bulges, disks and star-burst components, and thus for understanding the physical causes of the differential evolution that has now been seen in the faint galaxy population.
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