Mathematics – Logic
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5922c&link_type=abstract
HST Proposal ID #5922
Mathematics
Logic
Hst Proposal Id #5922 Galaxies &Amp, Clusters
Scientific paper
Detailed morphological classification of galaxies at high redshifts requires angular resolution of around 0.1^ FWHM and cannot be carried out from the ground. We propose to use the WFPC2 to observe the Hawaii deep survey fields SSA4 and SSA17 in the wide I band. These 2^ * 2^ fields have been observed at wavelengths, 3400 Angstrom, 4500 Angstrom, 5500 Angstrom, 8400 Angstrom and 2.1 micron to 5 Sigma galaxy detection limits of a microJy or below {K = 22, V = 27}. All galaxies with B <= 24, I <= 22 and K <= 19 now have determined redshifts and have been typed on the basis of their spectra, as have 65 19 and 20. The proposed WFPC2 observations will be used to type the K <= 20 galaxy sample and to study the evolution of the galaxy type mix, surface brightness profiles, and merger rates as a function of absolute magnitude and redshift. This program is a continuation of an approved Cycle 4 proposal, where the fields SSA22 and SSA13 are being imaged to the same depth. This data set has not yet been obtained.
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