1994/08/19 by L. Infante, P. Fouqué, P Fouque +10
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9408072
19 pages, compressed uuencoded postscript file, MZ/1/94
arxiv created 1994/08/19 · openalex publication_date 1994/08/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present magnitudes and redshifts of galaxies in the cluster of galaxies CL0017-20 and in the double cluster CL0500-24. Luminosity functions and velocity distributions have been derived. CL0017-20 possesses a virial mass of 2.9 × 1014 M_\odot and a \vmag band luminosity of 2.3 ± 0.5 × 1012 L_\odot (M/L\rm V = 127), much of it in a very compact core of size 113 kpc. Our new velocities and photometry of CL0500-24 confirm its double nature. Our group algorithm clearly detects two subconcentrations with masses 1.9 and 2.2 × 1014 M\odot. Its total \vmag band luminosity amounts to 2.7 ± 0.8 × 1012 L\odot (M/L\rm V of 157). Since the crossing and collapse times in both clusters are smaller than the age of the Universe, they appear bound and virialized. It is surprising that although M/L is small in these clusters, giant arcs have been detected in both.