Luminosity Functions of Lyman-Break Galaxies at z~4 and 5 in the Subaru Deep Field

Details Luminosity Functions of Lyman-Break Galaxies at z~4 and 5 in the Subaru Deep Field Luminosity Functions of Lyman-Break Galaxies at z~4 and 5 in the Subaru Deep Field

2006-08-24

arxiv.org/abs/astro-ph/0608512v1

Astrophys.J.653:988-1003,2006

Astronomy and Astrophysics

Astrophysics

28 pages, 25 figures, accepted for publication in ApJ, a high resolution version of Figs.7,8,9 is available at http://hikari

Scientific paper

10.1086/508621

We investigate the luminosity functions of Lyman-break galaxies (LBG) at z~4 and 5 based on the optical imaging data obtained in the Subaru Deep Field Project. Three samples of LBGs in a contiguous 875 arcmin^2 area are constructed. One consists of 3,808 LBGs at z~4 down to i'=26.85 selected with the B-R vs R-i' diagram. The other two consist of 539 and 240 LBGs at z~5 down to z'=26.05 selected with two kinds of two-color diagrams: V-i' vs i'-z' and R-i' vs i'-z'. The adopted selection criteria are proved to be fairly reliable by spectroscopic observation. We derive the luminosity functions of the LBGs at rest-frame ultraviolet wavelengths down to M_{UV}=-19.2 at z~4 and M_{UV}=-20.3 at z~5. We find clear evolution of the luminosity function over the redshift range of 04.

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