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Abundance of Helium in Stellar Atmospheres

Published online by Cambridge University Press:  30 March 2016

R. Cayrel
R. Cayrel*
Affiliation:
Paris-Meudon Observatory, Paris, France

Extract

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Helium abundance in stellar atmospheres has been the subject of several recent investigations, essentially induced by progresses in the computation of non-grey model atmospheres (including line blanketing in the far U.V.), by considerable advances in the theory of Stark broadening of helium lines, by non local thermodynamic equilibrium (LTE) work for the helium spectrum and more fundamentally by the intrinsic importance of the helium over hydrogen ratio in cosmological theories.

Type
III. Joint Discussions
Information
Highlights of Astronomy , Volume 2: Highlights of Astronomy. As presented at the XIVth General Assembly of the IAU, 1970 , 1971 , pp. 254 - 268
Copyright
Copyright © Reidel 1971

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