Abstract
The effect of initial chemical composition on the size and position of the Hertzsprung gap is examined. Evolutionary sequences for stars in the mass range 0.8M/sub sun/ to 2.5M/sub sun/ with initial chemical composition ranging from X=0.7 to 0.9 and Z=0.001 to 0.04 have been computed with the Cox-Stewart opacities handled by bicubic interpolation. The models show that chemical composition does not affect the size and position of the Hertzsprung gap to the extent necessary to explain such peculiar color-magnitude diagrams as that of the Large Magellanic Cloud cluster NGC 2209. (AIP)
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