Dependence of the Rossby number on helium and metal abundances

Details Dependence of the Rossby number on helium and metal abundances Dependence of the Rossby number on helium and metal abundances

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1279r&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, April 1990, p. 1279-1283.

Astronomy and Astrophysics

Astronomy

7

Abundance, Helium, Metallicity, Stellar Composition, Astronomical Models, Main Sequence Stars, Stellar Color, Stellar Mass

Scientific paper

Convective turnover times, tau, are calculated for solar-type stars of the zero-age main-sequence models of VandenBerg and Poll (1989) with helium abundances = 0.22, 0.27, and 0.32 and metal abundances = 0.0169, 0.024, and 0.03. Emphasis is given to the possible dependence of turnover times on the chemical composition of a star. It is found that deviations in log tau from a mean dependence on the (B-V) color are less than + or - 0.1. Thus, the predicted shape of the log tau vs. (B-V) relation is quite robust.

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