Physics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pyuno....s.323d&link_type=abstract
Publications of the Yunnan Observatory, Suppl. 1999, p. 323 - 326
Physics
Open Clusters: Blue Stragglers, Open Clusters: C-M Diagrams
Scientific paper
Blue stragglers are a common observational fact for the Galactic clusters. Single stellar population (SSPs) are basic to the studies of galaxy structure and evolution. SSPs are mainly based either on the observation of the integrated properties of star clusters, or on the theoretical understandings of single star evolution. Both of the two ways of making SSPs suffer from either observational uncertainties concerning field contaminations or lack of good models for close binary systems. Based on the photometry of the classical open cluster M67 and the thorough membership survey, the author made a color-magnitude diagram (CMD) of high membership stars for the cluster. He shows that by including the contributions of the bright blue stragglers that is common to open clusters, the integrated properties of the clusters are quite different from traditional SSP models.
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