Nucleosynthesis in 2D core-collapse supernovae of 11.2 and 17.0 M⊙ progenitors: implications for Mo and Ru production

Eichler, M and Nakamura, K. and Takiwaki, T. and Kuroda, T. and Kotake, K. and Hempel, M. and Cabezon, R. and Liebendörfer, M. and Thielemann, F.-K . (2018) Nucleosynthesis in 2D core-collapse supernovae of 11.2 and 17.0 M⊙ progenitors: implications for Mo and Ru production. Journal of Physics G: Nuclear and Particle Physics, 45 (1). 014001.

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Official URL: http://edoc.unibas.ch/58111/

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Core-collapse supernovae (CCSNe) are the first polluters of heavy elements in the galactic history. As such, it is important to study the nuclear compositions of their ejecta, and understand their dependence on the progenitor structure (e.g., mass, compactness, metallicity). Here, we present a detailed nucleosynthesis study based on two long-term, two-dimensional CCSN simulations of a 11.2 M${}_{\odot }$ and a 17.0 M${}_{\odot }$ star. We find that in both models nuclei well beyond the iron group (up to $Z\approx 44$) can be produced, and discuss in detail also the nucleosynthesis of the p-nuclei 92,94Mo and 96,98Ru. While we observe the production of 92Mo and 94Mo in slightly neutron-rich conditions in both simulations, 96,98Ru can only be produced efficiently via the ν p-process. Furthermore, the production of Ru in the ν p-process heavily depends on the presence of very proton-rich material in the ejecta. This disentanglement of production mechanisms has interesting consequences when comparing to the abundance ratios between these isotopes in the solar system and in presolar grains.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Astrophysik (Liebendörfer)
05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Hempel, Matthias
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:28 Dec 2017 07:44
Deposited On:28 Dec 2017 07:44

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