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Basic Data on Hydrogen-Deficient Stars

Published online by Cambridge University Press:  12 April 2016

J.S. Drilling
J.S. Drilling*
Affiliation:
Department of Physics and Astronomy Louisiana State University Baton Rouge, USA

Abstract

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The current state of our knowledge on the distribution and motions of various types of hydrogen-deficient stars, and of their positions in the H-R diagram, is reviewed. It is concluded that the extreme helium stars (with the exception of the H-deficient binaries) and cool hydrogen-deficient stars belong to the population of the Galactic nuclear bulge, whereas the intermediate helium stars are young stars of Population I. The helium-rich sdO stars appear to be a local sample which is predominantly Population I.

Type
II. Basic Data
Information
International Astronomical Union Colloquium , Volume 87: Hydrogen Deficient Stars and Related Objects , 1985 , pp. 8 - 22
Copyright
Copyright © Reidel 1986

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