Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981afz....17..719f&link_type=abstract
(Astrofizika, vol. 17, Oct.-Dec. 1981, p. 719-726.) Astrophysics, vol. 17, no. 4, Apr. 1982, p. 389-393. Translation.
Astronomy and Astrophysics
Astrophysics
1
Galactic Clusters, Galactic Structure, Spatial Distribution, Velocity Distribution, Mass Distribution, Missing Mass (Astrophysics), Radial Velocity, Random Processes, Selection, Variance (Statistics)
Scientific paper
Large apparent abundance galaxies are found to lie in a comparatively narrow range of distances from the observer, in samples based on apparent brightness. A maximum found in galaxy velocity distribution at the position where the number of galaxies increases which is not due to any single rich cluster, but rather several groups of galaxies which are fortuitously adjacent and simulate a single cluster. The expected minimum in velocity distribution where random processes (rather than the proposed cell structure of the universe) have placed few galaxies is confirmed by means of a simulation of the velocity distributions of galaxies in 800 sampling fields. It is suggested that neglect of this observational selection effect is responsible for the discovery of 'missing mass' in rich clusters.
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