The helium abundance in galactic globular clusters

Details The helium abundance in galactic globular clusters The helium abundance in galactic globular clusters

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90...53d&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Feb.-Mar. 1978, p. 53-56. ERDA-supported research.

Astronomy and Astrophysics

Astronomy

9

Abundance, Globular Clusters, Helium, Red Giant Stars, Stellar Evolution, Convection, Life (Durability), Stellar Atmospheres, Stellar Models

Scientific paper

The problem of the helium abundance in galactic globular clusters is discussed in light of two recent theoretical developments - the inclusion of semiconvection in horizontal-branch models and the explanation of the red edge of the RR Lyrae gap. These two results predict substantially different helium abundances. We propose alterations in red-giant models which can reduce, but by no means remove, the discrepancy.

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