Skip to main content

Research Repository

Advanced Search

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

Ritter, C.; Andrassy, R.; Côté, B.; Herwig, F.; Woodward, P. R.; Pignatari, M.; Jones, S.

Authors

C. Ritter

R. Andrassy

B. Côté

F. Herwig

P. R. Woodward

M. Pignatari

S. Jones



Contributors

Ritter C.
Other

Andrassy R.
Other

Côté B.
Other

Herwig F.
Other

Woodward P. R.
Other

Pignatari M.
Other

Jones S.
Other

Abstract

© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. 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 10-3M⊙s-1features overproduction factors OPs≈ 7. Full O-C shell mergers in our 1D stellar evolution massive star models have overproduction factors OPm> 1 dex but for such cases 3D hydrodynamic simulations suggest deviations from spherical symmetry. γ - process species can be produced with overproduction factors of OPm> 1 dex, for example, for130, 132Ba. Using the uncertain prediction of the 15M⊙, Z = 0.02 massive star model (OPm≈ 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 per cent of all stars, our chemical evolution models reproduce the observed Galactic trends of the odd-Z elements.

Citation

Ritter, C., Andrassy, R., Côté, B., Herwig, F., Woodward, P. R., Pignatari, M., & Jones, S. (2018). Convective–reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O–C shell mergers. Monthly notices of the Royal Astronomical Society. Letters, 474(1), L1-L6. https://doi.org/10.1093/mnrasl/slx126

Journal Article Type Article
Acceptance Date Aug 1, 2017
Online Publication Date Aug 3, 2017
Publication Date Feb 11, 2018
Deposit Date Mar 18, 2018
Publicly Available Date Mar 29, 2024
Journal MNRAS Letters
Electronic ISSN 1745-3933
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 474
Issue 1
Pages L1-L6
DOI https://doi.org/10.1093/mnrasl/slx126
Keywords Stars -- abundances; Stars -- evolution; Stars -- interiors; Physical data and processes; Hydrodynamics; Galaxy -- abundances
Public URL https://hull-repository.worktribe.com/output/586958
Publisher URL https://academic.oup.com/mnrasl/article/474/1/L1/4062155
Related Public URLs https://arxiv.org/abs/1704.05985
Additional Information This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review. The version of record is not currently available.

Files


Published article (3.7 Mb)
PDF

Copyright Statement
This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review. The version of record is not currently available.






You might also like



Downloadable Citations