Galaxies Associated with z~4 Damped Lya Systems: I. Imaging and Photometric Selection

Details Galaxies Associated with z~4 Damped Lya Systems: I. Imaging and Photometric Selection Galaxies Associated with z~4 Damped Lya Systems: I. Imaging and Photometric Selection

2002-01-25

arxiv.org/abs/astro-ph/0201417v2

Astronomy and Astrophysics

Astrophysics

12 pages, 6 embedded figures (3 color), 9 jpg figures. Higher quality ps versions of the images and the fits data are availabl

Scientific paper

10.1086/339833

This paper describes the acquisition and analysis of imaging data for the identification of galaxies associated with z~4 damped Lya systems. We present deep BRI images of three fields known to contain four z~4 damped systems. We discuss the reduction and calibration of the data, detail the color criteria used to identify z~4 galaxies, and present a photometric redshift analysis to complement the color selection. We have found no galaxy candidates closer to the QSO than 7'' which could be responsible for the damped Lya systems. Assuming that at least one of the galaxies is not directly beneath the QSO, we set an upper limit on this damped Lya system of L < L*/4. Finally, we have established a web site to release these imaging data to the public.

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