Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.5403s&link_type=abstract
American Astronomical Society, 185th AAS Meeting, #54.03; Bulletin of the American Astronomical Society, Vol. 26, p.1404
Astronomy and Astrophysics
Astronomy
Scientific paper
Isophotal light profiles have been determined for 29 faint field galaxies in Hubble Space Telescope (``HST'') images taken for the Medium Deep Survey (``MDS'') prior to the refurbishment mission, for which ground-based spectroscopy and reshifts are available. The images were obtained with the Wide Field Camera in ``parallel mode'' and deconvolved using the Lucy method with a large grid of observed field stars as point-spread functions. The effective resolution of the restored WFC images is { ~ }0.2('') FWHM. By fitting the light profiles to models of exponential disks and/or r(1/4) -bulges, accurate values for their scale-lengths (r_s and/or r_e) have been determined. Most galaxies in this sample are disk-dominated, with small central bulges. From ground-based spectroscopy, the measured redshifts for these galaxies are z=0.026---0.554. The light-profiles, color gradients and spectra of these galaxies are discussed as a function of galaxy type and cosmic time. This work was supported by NASA/HST grants GO-2684-0*-94A from STScI, which is operated by AURA, Inc., under NASA contract NAS5-26555.
Franklin Barbara E.
Griffiths Richard E.
Mutz Steven B.
Ostrander Eric J.
Pascarelle Sebastian M.
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