Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56.1165f&link_type=abstract
Astronomicheskii Zhurnal, vol. 56, Nov.-Dec. 1979, p. 1165-1173. In Russian.
Astronomy and Astrophysics
Astronomy
5
Galactic Clusters, Optical Properties, Abel Function, Algorithms, Astronomical Catalogs, Distortion, Electromagnetic Absorption, Radial Velocity
Scientific paper
Consideration is given to the properties of false Abell clusters, taking into account the effects of observational conditions and inhomogeneous light absorption on the observed distribution of clusters and superclusters. It is shown that the angular diameters of false clusters decrease more rapidly with magnitude than those of real clusters, and that the application of the selection algorithm of Abell leads to the selection of true clusters with populations less than 25 which have in their neighborhoods an elevated number of fore- and background galaxies. The numbers of false clusters in astronomical catalogs are roughly estimated, and it is pointed out that the false clusters are surprisingly well concealed by the true clusters.
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