EDP Sciences
Free access
Volume 434, Number 1, April IV 2005
Page(s) 53 - 65
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20041532

A&A 434, 53-65 (2005)
DOI: 10.1051/0004-6361:20041532

The Great Observatories Origins Deep Survey

VLT/FORS2 spectroscopy in the GOODS-South Field
E. Vanzella1, 2, S. Cristiani2, M. Dickinson3, H. Kuntschner4, L. A. Moustakas5, M. Nonino2, P. Rosati6, D. Stern7, C. Cesarsky6, S. Ettori6, H. C. Ferguson5, R. A. E. Fosbury4, M. Giavalisco5, J. Haase4, A. Renzini6, A. Rettura6, 8, P. Serra4, 9 and the GOODS Team

1  Dipartimento di Astronomia dell'Università di Padova, Vicolo dell'Osservatorio 2, 35122 Padova, Italy
    e-mail: evanzell@eso.org
2  INAF - Osservatorio Astronomico di Trieste, via G.B. Tiepolo 11, 40131 Trieste, Italy
3  National Optical Astronomy Obs., PO Box 26732, Tucson, AZ 85726, USA
4  ST-ECF, Karl-Schwarzschild Str. 2, 85748 Garching, Germany
5  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
6  European Southern Observatory, Karl-Schwarzschild-Strasse 2, Garching 85748, Germany
7  Jet Propulsion Laboratory, California Institute of Technology, MS 169-506, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
8  Université Paris-Sud XI, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
9  Kapteyn Instituut, Landleven 12, 9747 AD Groningen, The Netherlands

(Received 25 June 2004 / Accepted 14 December 2004 )

We present the first results of the ESO/GOODS program of spectroscopy of faint galaxies in the Chandra Deep Field South (CDF-S). 399 spectra of 303 unique targets have been obtained in service mode with the FORS2 spectrograph at the ESO/VLT, providing 234 redshift determinations (the median of the redshift distribution is at 1.04). The typical redshift uncertainty is estimated to be $\sigma_z \simeq 0.001$. Galaxies have been color selected in a way that the resulting redshift distribution typically spans from z=0.5 to 2. The reduced spectra and the derived redshifts are released to the community through the ESO web page http://www.eso.org/science/goods/. Large scale structure is clearly detected at $z \simeq 0.67, 0.73,
1.10$ and 1.61. Three Lyman-break galaxies have also been included as targets and are confirmed to have redshifts z=4.800, 4.882 and 5.828. In a few cases, we observe clear [OII]3727 rotation curves, even at the relatively low resolution ($\Re = 860$) of the present observations. Assuming that the observed velocity structure is due to dynamically-relaxed rotation, this is an indication of large galactic masses (few times $10 ^{11}~ M_\odot$) at $z \sim 1$.

Key words: cosmology: observations -- cosmology: large-scale structure of Universe -- galaxies: evolution

SIMBAD Objects
Tables at the CDS

© ESO 2005