Abstract
view Abstract Citations (129) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Luminosity Function and Structure of the Coma Cluster Abell, G. O. Abstract The luminosity function of the galaxies in the Coma cluster is determined by a procedure of extrafocal photographic photometry. The logarithmic integrated luminosity function rises sharply with increasing magnitude through the interval m = 11.6 to 14.5, and then slowly for greater magnitudes to the limit m = 19.4. The data suggest a moderate increase in the slope of the function for magnitudes fainter than m = 17.5. The cluster is found, in projection, to be ellipsoidal in shape, centered at (1950) a = 12h56m9 = +280141. To the limit m = 18.3 the cluster is estimated to have 1525 member galaxies. The brighter galaxies in the inner part of the cluster have a distribution resembling that of the isothermal polytrope, but there is no marked segregation of bright and faint galaxies, as would be required for complete statistical sequilibrium. The luminosity of the cluster is estimated at 2 x 1018 L0. The mass-to-light ratio (in solar units) is found probably not to exceed 122. Subject headings: galaxies: clusters of - galaxies: photometry Publication: The Astrophysical Journal Pub Date: April 1977 DOI: 10.1086/155159 Bibcode: 1977ApJ...213..327A full text sources ADS | data products NED (96)
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