Volume 462, Number 3, February II 2007
|Page(s)||865 - 873|
|Section||Cosmology (including clusters of galaxies)|
|Published online||13 November 2006|
GaBoDS: the Garching-Bonn deep survey *
VIII. Lyman-break galaxies in the ESO deep public survey
Argelander-Institut für Astronomie (Founded by merging of the Sternwarte, Radioastronomisches Institut and Institut für Astrophysik und Extraterrestrische Forschung der Universität Bonn.) , Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany e-mail: firstname.lastname@example.org
Accepted: 7 November 2006
Aims.The clustering properties of a large sample of U-dropouts are investigated and compared to very precise results for B-dropouts from other studies to identify a possible evolution from to .
Methods.A population of ~8800 candidates for star-forming galaxies at is selected via the well-known Lyman-break technique from a large optical multicolour survey (the ESO Deep Public Survey). The selection efficiency, contamination rate, and redshift distribution of this population are investigated by means of extensive simulations. Photometric redshifts are estimated for every Lyman-break galaxy (LBG) candidate from its UBVRI photometry yielding an empirical redshift distribution. The measured angular correlation function is deprojected and the resulting spatial correlation lengths and slopes of the correlation function of different subsamples are compared to previous studies.
Results.By fitting a simple power law to the correlation function we do not see an evolution in the correlation length and the slope from other studies at to our study at . In particular, the dependence of the slope on UV-luminosity similar to that recently detected for a sample of B-dropouts is confirmed also for our U-dropouts. For the first time number statistics for U-dropouts are sufficient to clearly detect a departure from a pure power law on small scales down to ~ reported by other groups for B-dropouts.
Key words: galaxies: photometry / galaxies: high-redshift
© ESO, 2007
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