Abstract
We investigate the evolution of the universal rest-frame ultraviolet luminosity density from z = 1.5 to the present. We analyze an extensive sample of multicolor data (U, BAB, VAB = 24.5) plus spectroscopic redshifts from the Hawaii Survey Fields and the Hubble Deep Field. Our multicolor data allow us to select our sample in the rest-frame ultraviolet (2500 A) over the entire redshift range to z = 1.5. We conclude that the evolution in the luminosity density is a function of the form (1 + z)1.7 ± 1.0 for a flat lambda (Ωm0 = 0.3, Ωλ0 = 0.7) cosmology and (1 + z)2.4 ± 1.0 for an Einstein–de Sitter cosmology.
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