The classification of open clusters by the centroid method of cluster analysis

Details The classification of open clusters by the centroid method of cluster analysis The classification of open clusters by the centroid method of cluster analysis

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..730e&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, July-Aug. 1988, p. 730-740. In Russian.

Astronomy and Astrophysics

Astrophysics

2

Galactic Evolution, Milky Way Galaxy, Open Clusters, Astrophysics, Classifications, Metallicity

Scientific paper

The distribution of open clusters in the Galaxy are considered, with space coordinates including mass, absolute magnitude, integrated color index, diameter, metallicity, and age. It is shown that the majority of clusters belong to several classes which have parameter values in a sufficiently narrow range. The classes form a linear sequence by age and monotonic sequence on a color-magnitude diagram. They are not isolated, but move into each other continuously. This suggests that the process of cluster formation contains no significant gaps. The bifurcation of the age sequence of classes depending on the mass and diameter values is found. This bifucation makes an evolutionary interpretation possible.

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