Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53.1153f&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, Nov.-Dec. 1976, p. 1153-1159. In Russian.
Astronomy and Astrophysics
Astronomy
1
Astronomical Catalogs, Galactic Clusters, Galactic Evolution, Galactic Structure, Correlation, Degrees Of Freedom, Distribution Functions, Spatial Distribution
Scientific paper
Difficulties in studying orientations of galaxies are discussed, and a simple method for studying the position-angle distribution of galaxies in the case of small samples is outlined. A parameter is introduced which is proportional to the chi-squared value in Pearson's compatibility test; the inapplicability of Pearson's criterion to very small samples is taken into account. Analysis of the cited parameter for small regions of the sky and for nearby Zwicky clusters plus a study of certain galaxy pairs lead to the conclusion that the position angles of galaxies belonging to the same system are distributed more uniformly than might be expected for a uniformly random distribution of mutually independent values. It is noted that this result may indicate spatial ordering of galaxies in systems when they originated.
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