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Recent Results Pertaining to the Helium-Rich Stars

Published online by Cambridge University Press:  14 August 2015

N. R. Walborn
N. R. Walborn*
Affiliation:
Cerro Tololo Inter-American Observatory, La Serena, Chile

Abstract

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The term helium-rich stars here refers to those stars with apparent spectral types near B2 ana helium lines which are enhanced, but not stronger than the hydrogen lines. The previously known helium-rich star HD 184927 has been found to be a spectrum variable; the equivalent widths of the helium lines changed by an average of 46% between two observations. HD 186205 has been newly recognized as a member of the helium-rich class. Further work toward understanding the rapidly variable Ha emission in the prototype helium-rich star, Sigma Orionis E, is in progress in co-operation with Dr J. E. Hesser at CTIO.

Type
Part III/Derivation of Abundances Through Photometric and Spectroscopic Methods
Information
Symposium - International Astronomical Union , Volume 72: Abundance Effects in Classification , 1976 , pp. 85
Copyright
Copyright © Reidel 1976