Galaxy groups at 0.3 ≤z≤ 0.55 - II. Evolution toz∼ 0
نویسندگان
چکیده
منابع مشابه
Galaxy evolution in clusters from z = 1 to z = 0
The XMM–LSS project is detecting distant clusters of low mass, quite comparable in mass to the ones in the local universe. This allows a direct comparison of galaxy properties at different redshifts in " similar " clusters. We present here first results on the evolution of the reddest galaxies in 25 clusters/groups at 0.3 < ∼ z < ∼ 1.0 and for the whole galaxy population in the same clusters. T...
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We present a combined study of the colour–magnitude relation, colour distribution and luminosity function of a sample of 24 clusters at redshifts 0.3 < z < 1. The sample is largely composed of X–ray selected/detected clusters. Most of the clusters at redshifts z < 0.6 display X–ray luminosity or richness typical of poor clusters or groups, rather than the more typical, massive clusters studied ...
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We measure spectral indices for 1823 galaxies in the CNOC1 sample of fifteen X–ray luminous clusters at 0.18 < z < 0.55, to investigate the mechanisms responsible for differential evolution between the galaxy cluster and field environments. The radial trends of D4000, W◦(Hδ) and W◦(OII) are all consistent with an age sequence, in the sense that the last episode of star formation occurred more r...
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The observed evolution of the galaxy cluster X-ray integral temperature distribution function between z = 0.05 and z = 0.32 is used in an attempt to constrain the value of the density parameter, Ω0, for both open and spatially-flat universes. We estimate the overall uncertainty in the determination of both the observed and the predicted galaxy cluster X-ray integral temperature distribution fun...
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We measure the redshift-dependent luminosity function and the comoving radial density of galaxies in the Sloan Digital Sky Survey Data Release 1 (SDSS DR1). Both measurements indicate that the apparent number density of bright galaxies increases by a factor≈ 3 as redshift increases from z = 0 to z = 0.3. This result is robust to the assumed cosmology, to the details of the K-correction and to d...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2005
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2005.08745.x