On the evolution of the Horizontal Branch stars of metal-poor Globular Clusters |
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| Authors: | V Castellani A Renzini |
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| Institution: | (1) Laboratorio di Astrofisica dell' Università di Roma, Frascati (Roma), Italy |
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| Abstract: | The actual knowledge on Horizontal Branch stars of the metal-poor Globular Clusters of our Galaxy suggests that these stars evolve along the Horizontal Branch from the very blue stars towards lower effective temperature.From this behaviour it follows that a substantial mass loss occurs at the He-flash. On the basis of a gravitational thermalization of Horizontal Branch stars any recent observational data concerning NGC 7006 are re-examined. It is pointed out that today it is not necessary to leave the hypothesis of a strong correlation between the metal and helium content for our Galaxy.At present at the Osservatorio Astronomico, Bologna. |
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