Evolution of Stellar Models with High Metal Content

Details Evolution of Stellar Models with High Metal Content Evolution of Stellar Models with High Metal Content

Dec 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971bott....6..113t&link_type=abstract

Boletín de los Observatorios de Tonantzintla y Tacubaya Vol. 6, pp. 113-130 (1971) (http://www.astroscu.unam.mx/~bott/)

Astronomy and Astrophysics

Astronomy

8

Stars: Abundances, Stars: Evolution

Scientific paper

Evolutionary sequences for stellar configurations between 1 and 1.45 M_&sun; with chemical abundances varying from Z = 0.023 to 0.10 and from X = 0.60 to 0.68 were computed using the Berkeley Stellar Evolution program. The effect of high metal abundances on the structure and evolution of models of 1.25 M_&sun; is studied in detail. It is found that for the compositions under consideration, the presence of a hydrogen-burning convective core is directly determined by the luminosity of the models on the main sequence. No core is present for an age zero main sequence model fainter than M_bol = 4.6 and the maximum age for a model with a core is 4.2 X 10^9 years; this result implies that any cluster with an observed gap is younger than this age.

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