Physics
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.265..124c&link_type=abstract
Nature, vol. 265, Jan. 13, 1977, p. 124-126. Research supported by the Swiss National Science Foundation.
Physics
14
Galactic Clusters, Intergalactic Media, Stellar Luminosity, Supernovae, Galactic Structure, Histograms, Radial Distribution, Radial Velocity
Scientific paper
A quantitative examination of the parameters of the Coma cluster of galaxies is attempted in dealing with the presumed nonexistence of intergalactic supernovae. Since at least 30% of the total luminosity of the cluster lies outside the regions normally associated with individual galaxies, restrictions on the nature of the luminous intergalactic material can be derived from the absence of intergalactic supernovae in this case. Radial distances and radial velocities of cluster galaxies, supernova rates per unit luminosity, ratio of luminosity of elliptical/SO galaxies to luminosity of spiral galaxies (6:1), supernova search efficiencies, and an upper limit to intergalactic supernova rates are approached quantitatively, as far as possible. It is concluded that the intergalactic medium is deficient in supernova progenitors (by a factor not less than 5), independent of the nature of the intergalactic luminous material.
Crane Patrick
Tammann Gustav A.
Woltjer Lodewijk
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