Presupernova evolution of massive stars

Details Presupernova evolution of massive stars Presupernova evolution of massive stars

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225.1021w&link_type=abstract

Astrophysical Journal, Part 1, vol. 225, Nov. 1, 1978, p. 1021-1029.

Astronomy and Astrophysics

Astrophysics

368

Astronomical Models, Nuclear Fusion, Stellar Evolution, Stellar Mass, Stellar Structure, Supernovae, Abundance, Giant Stars, Gravitational Collapse, Hydrostatics, Silicon

Scientific paper

Results are reported for detailed calculations of the evolution of complete 15- and 25-solar-mass Population I stars from the ZAMS to iron core collapse. The structure of entire stars is computed using an implicit hydrodynamics computer code, and careful consideration is given to the complex nuclear processes that characterize the final evolutionary stages. The configurations of the stars at the begining of core collapse are presented, salient features of the presupernova models are examined, and implications for nucleosynthesis and the supernova explosions believed to follow are discussed. It is found that both stars form substantially neutronized 'iron' cores during hydrostatic silicon burning and that the element abundances in the larger star have ratios that are remarkably close to their solar system values over the mass range from oxygen to calcium, while the smaller star is characterized by large enhancements of Ne, Mg, and Si.

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