The helium abundance of halo dwarfs

Details The helium abundance of halo dwarfs The helium abundance of halo dwarfs

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983prhe.work..179c&link_type=abstract

IN: ESO Workshop on Primordial Helium, Garching, West Germany, February 2, 3, 1983, Proceedings (A83-50030 24-90). Garching, Wes

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5

Abundance, Dwarf Stars, Helium, Stellar Evolution, Chemical Composition, Halos, Stellar Luminosity, Stellar Models

Scientific paper

The helium abundance of halo dwarfs is studied by considering the halo main sequence locus in the luminosity-temperature plane, where helium's effects are detectable. Isochrones computed for a variety of metallicities and helium abundances are compared with each other and with empirical data from nine halo dwarfs. After eliminating results for three discordant stars, a primordial helium abundance of 0.18 + or -0.03 is obtained.

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