Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..523s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 92, Sept. 1986, p. 523-533.
Astronomy and Astrophysics
Astronomy
34
Astronomical Photometry, Charge Coupled Devices, Galactic Clusters, Color-Magnitude Diagram, Data Reduction, Luminosity, Mass To Light Ratios, Spatial Distribution, Spiral Galaxies
Scientific paper
Photometry of 265 galaxies in rich cluster Cl 0024 + 1654 (z = 0.39), based on CCD imaging in three filters, is presented. The luminosity of this system ranks it among the richest known clusters, and it has a blue mass-to-light ratio of about 210. The color-magnitude diagram has a prominent E/S0 sequence. There are essentially no blue cluster members brighter than r equals about 19.3, and only very red galaxies inhabit the central 30 arcsec of the cluster. The blue cluster members have sizes and surface brightnesses similar to spiral galaxies in nearby clusters.
Dressler Alan
Gunn James E.
Schneider David P.
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