On the evolution and composition of Sirius and Procyon

Details On the evolution and composition of Sirius and Procyon On the evolution and composition of Sirius and Procyon

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199..127h&link_type=abstract

Astrophysical Journal, vol. 199, July 1, 1975, pt. 1, p. 127-130.

Astronomy and Astrophysics

Astrophysics

9

Abundance, Astronomical Models, Stellar Evolution, Stellar Mass, Chemical Composition, Hertzsprung-Russell Diagram, Main Sequence Stars, Metals, Stellar Structure

Scientific paper

Stellar models are calculated and compared to the new observational data available for Sirius and Procyon. Sirius can be fitted by normal compositions (X = 0.7, Z = 0.02) very near the zero-age main sequence. Procyon is more evolved, hence more ambiguous; an anomalous composition (high X or Z) or a smaller mass than the astrometric mass is necessary to fit its position in the H-R diagram.

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