Presupernova evolution of massive stars

TLDR

Presupernova evolution of massive stars has been extensively studied, with numerous citations and references in the literature. The authors present detailed calculations of the evolution of complete 15‑ and 25‑solar‑mass Population I stars from the zero‑age main sequence to iron core collapse. They compute full stellar structures with an implicit hydrodynamics code that incorporates detailed nuclear reaction networks for the final evolutionary stages. Both stars develop highly neutronized iron cores during silicon burning, and the 25‑solar‑mass star shows element abundances from oxygen to calcium close to solar values, while the 15‑solar‑mass star exhibits large enhancements of Ne, Mg, and Si. Published in The Astrophysical Journal (1978), DOI 10.1086/156569, with source code available at 2017ascl.soft02007W.

Abstract

view Abstract Citations (659) References (56) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Presupernova evolution of massive stars. Weaver, T. A. ; Zimmerman, G. B. ; Woosley, S. E. Abstract 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. Publication: The Astrophysical Journal Pub Date: November 1978 DOI: 10.1086/156569 Bibcode: 1978ApJ...225.1021W Keywords: Astronomical Models; Nuclear Fusion; Stellar Evolution; Stellar Mass; Stellar Structure; Supernovae; Abundance; Giant Stars; Gravitational Collapse; Hydrostatics; Silicon; Astrophysics; Collapse:Stellar Evolution; Evolution:Massive Stars; Nucleosynthesis:Stellar Evolution; Supernovae: Explosions full text sources ADS | Related Materials (1) Source Software: 2017ascl.soft02007W