NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-17 T09:38:07 PST
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For refcode 1995ApJ...451L...1S:
Retrieve 32 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1995ApJ...451L...1S CANADA-FRANCE REDSHIFT SURVEY: HUBBLE SPACE TELESCOPE IMAGING OF HIGH-REDSHIFT FIELD GALAXIES DAVID SCHADE AND S. J. LILLY Department of Astronomy, University of Toronto, Toronto, Ontario, Canada M55 1A7 DAVID CRAMPTON Dominion Astrophysical Observatory, National Research Council of Canada, Victoria, VSW 4M6 AND F. HAMMER, O. LE FEVRE, AND L. TRESSE Departement d'Astrophysique Estragalactique et de Cosmologie, Observatoire de Meudon, 92195 Meudon, France Received 1995 May 31; accepted 1995 June 27 ABSTRACT Hubble Space Telescope B and I images are presented of 32 galaxies with secure redshifts in the range 0.5 < z < 1.2 from the Canada-France Redshift Survey, a complete sample of galaxies with 17.5 <= I_AB_ <= 22.5. These galaxies exhibit the same range of morphological types as seen locally, i.e., ellipticals, spirals, and irregulars. The galaxies look far less regular in the B images (rest-frame ultraviolet) than at longer wavelengths, underlining the fact that optical images of galaxies at still higher redshift should be interpreted with caution. Quantitative analyses of the galaxies yield disk sizes, bulge fractions, and colors for each component. At these redshifts, galaxy disks show clear evidence for surface brightness evolution. The mean rest-frame central surface brightness of the disks of normal late-type galaxies is {mu}_AB_(B) = 20.2 +/- 0.25 mag arcsec^-2^, about 1.2 mag brighter than the Freeman law for nearby galaxies. Some degree of peculiarity/asymmetry is measurable in 10(30%) of the galaxies, and four (13%) show clear signs of interaction/mergers. There are nine galaxies (30%) dominated by blue compact components. These components, which appear to be related to star formation, occur most often in peculiar/asymmetric galaxies (some of which appear to be interacting), but a few are in otherwise normal galaxies. Thus, of the galaxies bluer than present-day Sb, one-third are `blue nucleated galaxies" and half are late-type galaxies with disks which are significantly brighter than normal galaxies at z = 0. Taken together, these two effects must be responsible for much of the observed evolution of the luminosity function of blue galaxies. Subject headings: galaxies: evolution - galaxies: fundamental parameters
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