Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..337s&link_type=abstract
Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 337-355. NASA-supported research
Astronomy and Astrophysics
Astrophysics
267
Astronomical Photometry, Cosmology, Galactic Clusters, Hubble Diagram, Charge Coupled Devices, Luminosity, Red Shift, Tables (Data)
Scientific paper
The way in which the luminosity of brightest cluster galaxy varies with cluster parameters is investigated in a sample of 84 Abell clusters of moderate redshift and of richness classes in the zero-to-5 range. A photometric system is used which is well matched with the low noise CCD detector employed, as well as to the arrangement of galaxies with different redshifts on a standard system. The data, together with measurements from earlier work which forms a low redshift sample of the 199 brightest cluster galaxies, confirm that the luminosity dispersion in first-rank cluster galaxies is about 0.34 mag. The colors of giant ellipticals have not changed since redshifts of 0.25, and the richness correction is well established at 0.10 mag/Abell richness class. Application of these corrections reduces the luminosity dispersion to 0.29 mag.
Gunn James E.
Hoessel John G.
Schneider David P.
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