Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..229h&link_type=abstract
Astrophysical Journal, Part 1, vol. 228, Feb. 15, 1979, p. 229-239. NSF-supported research.
Other
35
A Stars, Abundance, Astronomical Spectroscopy, Helium Isotopes, Stellar Structure, B Stars, Hertzsprung-Russell Diagram
Scientific paper
An investigation was conducted with the objective to examine a sample of He-weak stars, as well as some 'normal' stars in the same temperature range. A variety of other hot peculiar objects, including Si and Hg-Mn stars, were also observed. The identification of He-3 is made by accurately measuring the small isotope shifts of the He I lines in the visible spectrum. The expected isotope shifts for pure He-3 were provided by Fred et al. (1951). Definite He-3 stars include 3 Centauri A, Alpha Sculptoris, Iota Orionis B, HR 1951, HR 2306, HR 7129, HR 7467, and HD 191980. Attention is also given to probable He-3 stars, and questions regarding the existence of He-3 in silicon stars
Cowley Anne Pyne
Hartoog Mark R.
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