The HST Medium Deep Survey: Light Profiles and Redshifts for Field Galaxies out to z${\sim}$0.6
Session 54 -- HST Medium Deep Survey
Display presentation, Tuesday, 10, 1995, 9:20am - 6:30pm

## [54.03] The HST Medium Deep Survey: Light Profiles and Redshifts for Field Galaxies out to z${\sim}$0.6

P. C. Schmidtke, R. A. Windhorst, S. B. Mutz, S. M. Pascarelle, B. E. Franklin, E. J. Ostrander (ASU), R. E. Griffiths (JHU)

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 ${\sim}0.2^{\prime\prime}$ 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.