Color-selected galaxies AT z ≈ 6 in the great observatories origins deep survey

M. Dickinson*, D. Stern, M. Giavalisco, H. C. Ferguson, Z. Tsvetanov, R. Chornock, S. Cristiani, S. Dawson, A. Dey, A. V. Filippenko, L. A. Moustakas, M. Nonino, C. Papovich, S. Ravindranath, A. Riess, P. Rosati, H. Spinrad, E. Vanzella

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

196 Scopus citations

Abstract

We report early results on galaxies at z ∼ 6 selected from Hubble Space Telescope imaging for the Great Observatories Origins Deep Survey. Spectroscopy of one object with the Advanced Camera for Surveys grism and from the Keck and Very Large Telescope observatories shows a strong continuum break and asymmetric line emission, identified as Lyα at z = 5.83. We find only five spatially extended candidates with signal-to-noise ratios greater than 10, two of which have spectroscopic confirmation. This is much fewer than would be expected if galaxies at z = 6 had the same luminosity function as those at z = 3. There are many fainter candidates, but we expect substantial contamination from foreground interlopers and spurious detections. Our best estimates favor a z = 6 galaxy population with fainter luminosities, higher space density, and similar comoving ultraviolet emissivity to that at z = 3, but this depends critically on counts at fluxes fainter than those reliably probed by the current data.

Original languageEnglish (US)
Pages (from-to)L99-L102
JournalAstrophysical Journal
Volume600
Issue number2 II
DOIs
StatePublished - Jan 10 2004
Externally publishedYes

Keywords

  • Early universe
  • Galaxies: evolution
  • Galaxies: formation
  • Galaxies: high-redshift

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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