Statistics – Computation
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...69..911s&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 69, April 1989, p. 911-950. Research supported by NASA.
Statistics
Computation
88
Abundance, Magellanic Clouds, Main Sequence Stars, Red Giant Stars, Stellar Evolution, Stellar Mass, Galactic Clusters, Helium, Metallicity, Morphology, Time Dependence
Scientific paper
A grid of 100 evolutionary sequences extending from the zero-age main sequence to the onset of helium burning has been computed for stellar masses between 1.4 and 3.4 solar masses, helium abundances of 0.20 and 0.30, and heavy-element abundances of 0.004, 0.01, and 0.04. Using these computations the transition in the morphology of the red giant branch (RGB) between low-mass stars, which have an extended and luminous first RGB phase prior to helium ignition, and intermediate-mass stars, which do not, is investigated. Extensive tabulations of the numerical results are provided to aid in applying these sequences. The effects of the first dredge-up on the surface helium and CNO abundances of the sequences is discussed.
Greggio Laura
Renzini Alvio
Sweigart Allen V.
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