Convective-reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O-C shell mergers

Abstract

We address the deficiency of odd-Z elements P, Cl, K and Sc in galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O- and C shells in massive stars. 3D hydrodynamic simulations of O-shell convection with moderate C-ingestion rates show no dramatic deviation from spherical symmetry. We derive a spherically averaged diffusion coefficient for 1D nucleosynthesis simulations which show that such convective-reactive ingestion events can be a production site for P, Cl, K and Sc. An entrainment rate of $10^{-3}{\mathrm{M}}_{\odot }$/s features overproduction factors $O{P}_{\mathrm{s}}\approx 7$. Full O-C shell mergers in our 1D stellar evolution massive star models have overproduction factors $O{P}_{\mathrm{m}}>1\mathrm{dex}$ but for such cases 3D hydrodynamic simulations suggest deviations from spherical symmetry. p-process species can be produced with overproduction factors of $O{P}_{\mathrm{m}}>1\mathrm{dex}$, e.g. for ${}^{130,132}Ba$. Using the uncertain prediction of the $15{\mathrm{M}}_{\odot }$, $Z=0.02$ massive star model ($O{P}_{\mathrm{m}}\approx 15$) as representative for merger or entrainment convective-reactive events involving O- and C-burning shells, and assume that such events occur in more than 50% of all stars, our chemical evolution models reproduce the observed Galactic trends of the odd-Z elements.

6 pages, 6 figures, accepted for publication in MNRAS

References in corpus (8)

• Galactic chemical evolution: Carbon through Zinc
• A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
• Aspherical Properties of Hydrodynamics and Nucleosynthesis in Jet-induced Supernovae
• i-process nucleosynthesis and mass retention efficiency in He-shell flash evolution of rapidly accreting white dwarfs
• The Impact of Modeling Assumptions in Galactic Chemical Evolution Models
• The production of proton-rich isotopes beyond iron: The $\gamma$ process in stars
• Idealised hydrodynamic simulations of turbulent oxygen-burning shell convection in 4π geometry
• On the Sensitivity of Massive Star Nucleosynthesis and Evolution to Solar Abundances and to Uncertainties in Helium Burning Reaction Rates

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