Improved nucleosynthetic yields

David Arnett, Casey Meakin, Patrick Young

Research output: Contribution to journalArticle

Abstract

Theoretical estimates of nucleosynthesis yields are widely used to infer the meaning of abundance trends, and to predict behavior of abundances in the first stars. We show that the standard prescriptions are incomplete, and illustrate some simple improvements. We consider the effects of internal gravity waves (induced in radiative regions by convective zones) on the evolution of slowly rotating (nonrotating) stars. We demonstrate that such modifications to the standard evolutionary algorithms give better agreement with observation. They imply new phenomena: interations between carbon and oxygen burning shells, detached flames in convective layers, and intermittency, for example. We argue that such hydrodynamic behavior must be part of realistic stellar evolution. Some preliminary results for the Sun and Sirius are discussed.

Original languageEnglish (US)
Pages (from-to)151-156
Number of pages6
JournalProceedings of the International Astronomical Union
Volume1
Issue numberS228
DOIs
StatePublished - Jan 1 2005

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Keywords

  • Abundances
  • Gravitational waves
  • Nuclear reactions
  • Nucleosynthesis
  • Stars: evolution
  • Sun: general

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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