Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7972y&link_type=abstract
HST Proposal ID #7972
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #7972 Extragalactic Astrophysics
Scientific paper
The NICMOS pure parallel imaging survey for the first time provides a wealth of data at near-IR wavelengths with HST resolution. We propose to use all of the archival NICMOS camera 3 images of high galactic latitude fields to carry out a detailed study of galaxy evolution. This survey will cover 150 square arcminutes to a depth of H 23.5, including individual fields that go as deep as H=24.5. The parallel data taken in November, 1997, show images with a measured FWHM for stellar objects of 0.23''. In one orbit of integration { 3000 seconds} these data reach an H magnitude of 23.5 at 10Sigma for a 0.3'' diameter aperture. We have developed expertise in reducing these data and have completed our first paper detailing the number counts and half-light radii of faint galaxies to H=24.5. We will {1} reduce the entire NICMOS parallel imaging data set {F160W and F110W filters}; {2} provide deep counts, colors, and where possible, morphological classifications for this galaxy survey; {3} use the two-point correlation function to assess correlations on angular scales from several arcseconds to a few tenths of an arcsecond { 1 kpc for z>1}; {4} obtain V, R, and I images of the deepest fields at WIYN and Las Campanas to estimate photometric redshifts; {5} and obtain spectroscopic redshifts of selected objects with LRIS on Keck. This survey complements the data from the NICMOS GTO HDF observations {0.7Box '}, as well as the GO parallel grism survey {PI: P. McCarthy} and the GO HDF survey {5Box '} {PI: M. Dickinson}.
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