Mathematics – Logic
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437l..17f&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 437, no. 1, p. L17-L21
Mathematics
Logic
19
Galactic Evolution, Galactic Structure, Morphology, Red Shift, Stellar Color, Color-Magnitude Diagram, Hubble Space Telescope, Image Processing, Spatial Resolution
Scientific paper
Until recently, the study of faint field galaxies has been limited by the spatial resolutions available to ground-based imaging. Here we present HST images with 0.1 arcsec resolution for a sample of 203 field galaxies with I is less than or equal to 22 (corresponding to B is less than equal to 24.5). The expected median redshift for such a sample is z approximately 0.5. The high resolution of HST allows us to measure the nuclear (central-kiloparsec) color. We have also classified the morphological type of each galaxy and noted any signs of peculiarities or the presence of nearby galaxies. For the brightest third of the sample, familiar Hubble types have been assigned. Combining the types with nuclear colors, we find weak evidence that merging/interacting galaxies have bluer colors than noninteracting galaxies.
Elson Rebecca A. W.
Forbes Duncan A.
Illingworth Garth D.
Koo David C.
Phillips Andrew C.
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