A Population II main sequence |
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| Authors: | V Castellani A Renzini |
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| Institution: | (1) Centro di Astrofisica, Frascati (Roma), Italy;(2) Present address: Osservatorio Astronomico, Bologna, Italy |
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| Abstract: | Results of calculations of main sequence stellar models for metal poor star are presented. A fictitious pre-main sequence evolution was computed in order to give the distribution of the primary elements H, He3, He4, C12, N14 and O16 in the stellar interior. The selected initial chemical composition wasX=.9,Z=.001.Comparison with previous results indicates a life-time of the main sequence phase shorter than it was believed before. |
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