Formation and evolutionary properties of the Galactic open cluster system

Details Formation and evolutionary properties of the Galactic open cluster system Formation and evolutionary properties of the Galactic open cluster system

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249...76b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 1, 1991, p. 76-83.

Astronomy and Astrophysics

Astronomy

67

Galactic Evolution, Molecular Clouds, Open Clusters, Star Formation, Astronomical Catalogs, Solar Neighborhood, Star Formation Rate, Stellar Luminosity

Scientific paper

Results are reported from a statistical analysis of observational data on 100 open clusters within 2 kpc of the sun, selected from the catalog of Lynga (1987). The selection criteria and the completeness of the sample are discussed; the data are compiled in a table; and the analysis results are presented in a series of graphs and characterized in detail. A cluster formation rate of 0.45 clusters/kpc Myr is found, significantly lower than the rates determined previously (using clusters within 1 kpc of the sun) and corresponding to a cluster star-formation efficiency of 0.0063. The low average cluster lifetime (about 10 Myr) suggests that clusters are formed as unstable systems.

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