Problem of the individuality of clusters of galaxies

Details Problem of the individuality of clusters of galaxies Problem of the individuality of clusters of galaxies

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978iraj...13..241r&link_type=abstract

Irish Astronomical Journal, vol. 13, Sept.-Dec. 1978, p. 241-244.

Mathematics

Logic

1

Galactic Clusters, Hierarchies, Galactic Structure, Morphology, Volcanoes

Scientific paper

Whether clustering of galaxies means that galaxies belong to individual clusters of various size orders (hierarchical clustering) or that the space density of galaxies is subject to strong non-random fluctuations (continuous clustering) is discussed in the article. The use of general statistical methods is discounted, but finding morphological features characteristic of individual clusters is proposed, as a method of answering this question. In other words, either correlate in a one-to-one correspondence the spectral or brightness peculiarities of first-rank galaxies in clusters to the central cores of clusters, or relate (one-to-one) a 'ditch of lower density' (Rudnicki 1967) to all known individual clusters.

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