  We have used the 30'x30' Hubble Space Telescope image mosaic from the Galaxy
Evolution from Morphology and SEDs (GEMS) project in conjunction with the
COMBO-17 deep photometric redshift survey to define a sample of nearly 1500
galaxies with 0.65 < z < 0.75. With this sample, we can study the distribution
of rest-frame V-band morphologies more than 6 Gyr ago, without differential
bandpass shifting and surface brightness dimming across this narrow redshift
slice. Focusing on red-sequence galaxies at z ~ 0.7, we find that 85% of their
combined rest-frame V-band luminosity density comes from visually-classified
E/S0/Sa galaxies (at V-band magnitudes brighter than -19.5). Similar results
are obtained if automated classifiers are used. This fraction is identical to
that found at the present day, and is biased by less than 10% by large scale
structure and the morphology-density relation. Under the assumption that
peculiar and edge-on disk galaxies are red by virtue of their dust content, we
find that less than 13% of the total rest-frame V-band luminosity of the z ~
0.7 red galaxy population is from dusty galaxies.

Astrophysics