Mathematics – Logic
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mlsg.book.....e&link_type=abstract
Morphological and luminosity segregation of galaxies., by Einasto, M.. Tartu Univ. (Estonia), May 1991, 36 p.,
Mathematics
Logic
Scientific paper
This thesis consists of the present overview and of the collection of seven papers, published during the period 1987 - 1990. It is dedicated to the study of the morphology - luminosity - density relation in more detail than it has been done earlier. The author's aim has been to study the large scale spatial distribution and clustering properties of galaxies of various types in the vicinity of three nearby superclusters: Virgo, Coma and Perseus, using various quantitative methods. The author checked the morphological segregation in these regions and extended the morphology - density relation to lower density regions, studying the isolated galaxy population. He studied the spatial distribution of galaxies of various luminosities, including dwarf galaxies, to determine a possible luminosity - density relation and to compare the morphology - density relation for galaxies of various luminosities. He also checked for the presence of truly isolated galaxies. To determine systems of galaxies the author used cluster analysis, which formed the foundation to apply multiplicity analysis, percolation analysis, and population analysis in systems of various richness. He also applied other quantitative methods like the nearest neighbour test, the study of correlation functions and void probability functions. Several methods were applied in studies of the morphological and luminosity segregation for the first time.
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