Mathematics – Logic
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5399c&link_type=abstract
HST Proposal ID #5399
Mathematics
Logic
Hst Proposal Id #5399 Galaxies &Amp, Clusters Surveys
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 SSA13 and SSA22 in the wide I band. These 2' x 2' fields have been observed at wavelengths 2200A (HST cycle 1),3400A,4500A,8400A and 2.1 micron to 5 sigma galaxy detection limits of a microJy or below (K=22, V=27). All galaxies with B<24 and K<19 now have determined redshifts and have been typed on the basis of their spectra as have 65 percent of the galaxies between K=19-20. SSA13 is a candidate field for the Japan-Hawaii ISO deep survey which will be the deepest 10 micron observation carried out with the ISO satellite. 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 rate as a function of absolute magnitude and redshift. The program was accepted in Cycle 1 for both wide band WFPC and 2200A FOC observations. After the discovery of the aberration the allocated time was concentrated into the 2200A FOC studies.
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