1998/02/17 by Ping He, P. He, Y.-Z. Zhang +1 · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Hubble Deep Field #Hubble Ultra-Deep Field #Hubble space telescope #Hubble's law #Luminosity #Luminosity function #Redshift #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.1998.01649.x
published in Monthly Notices of the Royal Astronomical Society 298(2), 483-496 (Oxford University Press) · Plain tex, 15pages, 9 eps figures, plus an extra figure fig2c.eps, with the tex-macro mn.tex. MNRAS, accepted
arxiv created 1998/02/17 · openalex publication_date 1998/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper, we explore the plausible luminosity evolution of early-type galaxies in different cosmological models by constructing a set of pure luminosity evolution (PLE) models via the choices of the star-formation rate (SFR) parameters and formation redshift zf of galaxies, with the observational constraints derived from the Hubble Space Telescope (HST ) morphological number counts for elliptical and S0 galaxies of the Medium Deep Survey (MDS) and the Hubble Deep Field (HDF). We find that the number counts of early-type galaxies can be explained by the pure luminosity evolution models, without invoking exotic scenarios such as merging or introducing an additional population, but the evolution should be nearly passive, with a high zf assumed. The conclusion is valid in all of the three cosmological models we adopt in this paper. We also present the redshift distributions for three bins of observed magnitudes in the F814w passband, to show the redshift at which the objects that dominate the counts at a given magnitude may be found. The predictions of the redshift distribution of 22.5 < bj < 24.0 are also presented for comparison with future data.