1999/04/25 by Lennox L. Cowie, L. L. Cowie, A. Songaila +3 · 6 citations
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #CCD and CMOS Imaging Sensors #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1086/300959
published as Astron.J.118:603-612,1999 · 37 pages including 18 figures. Also available at http://www.ifa.hawaii.edu/~acowie/uvlum.html To be published in the August, 1999 Astronomical Journal (accepted April 22, 1999)
arxiv created 1999/04/25 · openalex publication_date 1999/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We have utilized various magnitude-limited samples drawn from an extremely deep and highly complete spectroscopic redshift survey of galaxies observed in seven colors in the Hawaii Survey Fields and the Hubble Deep Field to investigate the evolution of the universal rest-frame ultraviolet luminosity density from z = 1 to the present. The multicolor data ( U ', B , V , R , and I , J , HK ') enable the sample selection to be made in the rest-frame ultraviolet for the entire redshift range. Because of the large sample size and depth ( U AB = 24.75, B AB = 24.75, I AB = 23.5), we are able to accurately determine the luminosity density to z = 1. We do not confirm the very steep evolution reported by Lilly et al. but instead find a shallower slope, approximately (1 + z ) 1.5 for q 0 = 0.5, which would imply that galaxy formation is continuing smoothly to the present time rather than peaking at z = 1. Much of the present formation is taking place in smaller galaxies. Detailed comparisons with other recent determinations of the evolution are presented.