M. Dickinson et al 2004 ApJ 600 L99 doi:10.1086/381119
Color-selected Galaxies at z 
6 in the Great Observatories Origins Deep Survey*
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M. Dickinson1, D. Stern2, M. Giavalisco1, H. C. Ferguson1, Z. Tsvetanov3, R. Chornock4, S. Cristiani5, S. Dawson4, A. Dey6, A. V. Filippenko4, L. A. Moustakas1, M. Nonino5, C. Papovich7, S. Ravindranath1, A. Riess1, P. Rosati8, H. Spinrad4 and E. Vanzella8,9
Show affiliationsWe 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.
- Footnote
- Subject headings
early universe; galaxies: evolution; galaxies: formation; galaxies: high-redshift
- Dates
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Issue 2 (2004 January 10)
Received 2003 May 28, accepted for publication 2003 October 31
Published 2004 January 9
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Color-selected Galaxies at z 6 in the Great Observatories Origins Deep Survey
M. Dickinson et al 2004 ApJ 600 L99
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