GEMS imaging of red-sequence galaxies at z ∼ 0.7: Dusty or old?

Eric F. Bell, Daniel H. McIntosh, Marco Barden, Christian Wolf, John A.R. Caldwell, Hans Walter Rix, Steven V.W. Beckwith, Andrea Borch, Boris Häussler, Knud Jahnke, Shardha Jogee, Klaus Meisenheimer, Chien Peng, Sebastian F. Sanchez, Rachel S. Somerville, Lutz Wisotzki

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

We have used the 30′ × 30′ Hubble Space Telescope image mosaic from the Galaxy Evolution from Morphology and Spectral energy distributions (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 down to MV - 5 log h ≲ -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.

Original languageEnglish (US)
Pages (from-to)L11-L14
JournalAstrophysical Journal
Volume600
Issue number1 II
DOIs
StatePublished - Jan 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: elliptical and lenticular, cD
  • Galaxies: evolution
  • Galaxies: general
  • Galaxies: stellar content

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