The intermediate-redshift galaxy cluster CL 0048-2942
نویسندگان
چکیده
منابع مشابه
The intermediate - redshift galaxy cluster CL 0048 - 2942 . Stellar populations
We present a detailed study of the cluster CL 0048-2942, located at z ∼ 0.64, based on a photometric and spectro-scopic catalogue of 54 galaxies in a 5 × 5 arcmin 2 region centred in that cluster. Of these, 23 galaxies were found to belong to the cluster. Based on this sample, the line-of-sight velocity dispersion of the cluster is approximately 680 ± 140 km/s. We have performed stellar populat...
متن کاملPhotometric Properties of Galaxy Population in the Cluster EIS 0048 - 2942 at z ∼ 0 . 64
Deep photometric data in the V-, R-, I-, zand K-bands for the cluster of galaxies EIS 0048-2942 are used to investigate the properties of the galaxy populations at z ∼ 0.64 in a field of 2.5 × 2.5 Mpc. The sample of candidate cluster members (N = 171) is selected by the photometric redshift technique and is complete up to I = 22.5. Galaxies were classified as spheroids and disks according to th...
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Galaxy groups likely to be virialized are identified within the CNOC2 intermediate redshift galaxy survey using an iterative method. The resulting groups have a median velocity dispersion of about 200 km s−1. The virial mass-to-light ratios, using k-corrected and evolution-compensated luminosities, have medians in the range of 150 − 250hM⊙/L⊙. The number-velocity dispersion relation is in agree...
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The number of rich galaxy clusters per unit volume is a strong function of , the cosmological density parameter, and 8 , the linear extrapolation to z = 0 of the density contrast in 8h ?1 Mpc spheres. The CNOC cluster redshift survey provides a sample of clusters whose average mass prooles are accurately known, which enables a secure association between cluster numbers and the ltered density pe...
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The number of rich galaxy clusters per unit volume is a strong function of V, the cosmological density parameter, and s8, the linear extrapolation to z 5 0 of the density contrast in 8 h Mpc spheres. The Canadian Network for Observational Cosmology (CNOC) cluster redshift survey provides a sample of clusters, the average mass profiles of which are accurately known, which enables a secure associ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2004
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20041215