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Horizontal-Branch Stars by Strong HE Lines
Published online by Cambridge University Press: 19 July 2016
Abstract
We discuss observations of He lines at λ 4026 å in two stars in NGC 6752 and three in M 92. M 92 and NGC 6752 are moderate to extreme second parameter clusters. The presence of He lines in stars where diffusion should deplete atmospheric helium may be a clue to the identity of the second parameter. One such candidate which could easily inhibit diffusion is rotation.
- Type
- Chapter VII. Poster Papers on Harlow Shapley and Globular Clusters in the Milky Way
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- Copyright © Kluwer 1988