Evidence for a Gradual Decline in the Universal Rest-Frame UV Luminosity Density for z < 1

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dc.creatorCowie, Lennox L.
dc.creatorSongaila, Antoinette
dc.creatorBarger, Amy J.
dc.date1999-04-25
dc.date.accessioned2026-07-07T11:08:28Z
dc.date.available2026-07-07T11:08:28Z
dc.descriptionWe 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 multi-color data (U', B, V, R, I, J, HK') enable the sample selection to be made in the rest-frame ultraviolet for the entire redshift range. Due to 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. (1996) but instead find a shallower slope, approximately (1+z)^{1.5} for q0 = 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.
dc.description37 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)
dc.identifierhttps://arxiv.org/abs/astro-ph/9904345
dc.identifierhttp://arxiv.org/abs/astro-ph/9904345
dc.identifierAstron.J.118:603-612,1999
dc.identifierdoi:10.1086/300959
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190144
dc.subjectAstrophysics
dc.titleEvidence for a Gradual Decline in the Universal Rest-Frame UV Luminosity Density for z < 1
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