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Intermediate He Rich Stars

Published online by Cambridge University Press:  19 July 2016

K. Hunger ,
D. Groote  and
U. Heber
K. Hunger
Affiliation:
1)Institut für Theoretische Physik und Sternwarte der Univ. Kiel Olshausenstr. 40, W-2300 Kiel Germany
D. Groote
Affiliation:
2)Hamburger Sternwarte Gojenbergweg 112 W-2050 Hamburg 80 Germany
U. Heber
Affiliation:
1)Institut für Theoretische Physik und Sternwarte der Univ. Kiel Olshausenstr. 40, W-2300 Kiel Germany

Extract

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Intermediate helium stars are defined by the number ratio of helium to hydrogen: Whereas at the helium rich end, there is a distinct gap between the intermediates and the extreme helium stars, the borderline between the intermediates and the normal B-stars appears less well defined. 24 stars are listed by Drilling and Hill (1986), with V < 11m. It can be anticipated that a major fraction has as yet escaped detection.

Type
The Upper Main Sequence
Information
Symposium - International Astronomical Union , Volume 145: Evolution of Stars: The Photospheric Abundance Connection , 1991 , pp. 173 - 181
Copyright
Copyright © Kluwer 1991 

References

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