The influence of the helium abundance on the appearance of late type spectra

Details The influence of the helium abundance on the appearance of late type spectra The influence of the helium abundance on the appearance of late type spectra

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..521b&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Dec. 1, 1979, p. 521-527.

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38

Absorption Spectra, Abundance, Giant Stars, Globular Clusters, Helium, Red Giant Stars, Late Stars, Metals, Rayleigh Scattering, Stellar Atmospheres, Stellar Spectrophotometry

Scientific paper

The paper studies the dependence of atomic, ionic, and molecular lines on the helium abundance in stars in which the continuous absorption is due to H(-) and the electrons are supplied by the metals, which are assumed to be mainly ionized. These conditions will approximately apply to subgiants and red giants. Possible applications to red giant studies in Omega Cen, M22, 47 Tuc, NGC 2420, and Draco are discussed.

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