Abstract
It has been known for decades that s-process elements from Sr to Pb are produced by Asymptotic Giant Branch stars. However only recently, physically-based mixing mechanisms for the formation of \(^{13}\)C have been proposed. Among them, we aim to verify the robustness of the model of a MHD induced \(^{13}\)C-pocket formation. In doing that we present results of nucleosynthesis models for low mass AGB stars, developed from the MHD scenario, compared with the isotopic abundance ratios of s-elements from presolar Mainstream SiC grains.
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Notes
- 1.
Among Silicon Carbide (SiC) grains those belonging to the Mainstream group are the most numerous and have carbon and nitrogen isotopic compositions that, together with traces of s-elements, hint to AGB origins.
- 2.
Magnetic Hydro Dynamic.
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Palmerini, S., Busso, M., Trippella, O., Vescovi, D. (2019). s-Processing from MHD-Induced Mixing and Isotopic Abundances in Presolar SiC Grains. In: Formicola, A., Junker, M., Gialanella, L., Imbriani, G. (eds) Nuclei in the Cosmos XV. Springer Proceedings in Physics, vol 219. Springer, Cham. https://doi.org/10.1007/978-3-030-13876-9_33
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