The effect of Main-Sequence stars on age estimates of open clusters |
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| Authors: | Ram Sagar |
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| Institution: | (1) Royal Observatory, Blackford Hill, Edinburgh, Scotland, UK |
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| Abstract: | Existing methods for age estimation of open clusters are discussed. Most of the observed open clusters (except extremely young and old) contain 50–90% unevolved Main-Sequence stars. Possible difficulties encountered in estimating the actual age of an unevolved Main-Sequence star are discussed. For a relatively reliable cluster age estimation only a small percentage of cluster members are suitable. The effect of unevolved Main-Sequence stars on open cluster age estimates using the modified method of isochromes is analyzed.On leave of absence from the Department of Physics, Kumaon University, Naini Tal, India. |
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