Mathematics – Logic
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19713413c&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #134.13; Bulletin of the American Astronomical Society, Vol. 33, p.721
Mathematics
Logic
Scientific paper
The Hubble Deep Fields have provided morphological information for the faintest galaxies to date (B < ~ 26 mag). Given the small sky coverage, this remarkable data set has provided little information on brighter galaxies (B < ~ 23 mag). Other Hubble Space Telescope surveys have provided morphological data and B-band magnitudes for brighter galaxies up to B ≳ 19 mag. In order to properly model the galaxy counts, the models are traditionally normalized at B ≈ 18 mag where there is little morphological data. In order to address this, we have gathered several wide-field ground-based B-band observations originally taken for other purposes. We will classify (and count) the galaxies to as faint a level as possible, where the limiting factor is atmospheric seeing. The results will be combined with the HST studies and used to refine the models to study the effects of galaxy evolution on the galaxy counts. Here we present our preliminary results, with an emphasis on the ground-based morphological sample. We acknowledge NASA grant GO-6609.01-96A from STScI, which is operated by AURA, Inc., under NASA contract NAS5-26555. SHC acknowledges support from an ASU NASA Space Grant.
Cohen Seth H.
Odewahn Stephen C.
Windhorst Rogier A.
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