TY  - JOUR
A1  - Vescovi, Diego
T1  - Mixing and magnetic fields in asymptotic giant branch stars in the framework of FRUITY models
T2  - Universe
N2  - In the last few years, the modeling of asymptotic giant branch (AGB) stars has been much investigated, both focusing on nucleosynthesis and stellar evolution aspects. Recent advances in the input physics required for stellar computations made it possible to construct more accurate evolutionary models, which are an essential tool to interpret the wealth of available observational and nucleosynthetic data. Motivated by such improvements, the FUNS stellar evolutionary code has been updated. Nonetheless, mixing processes occurring in AGB stars’ interiors are currently not well-understood. This is especially true for the physical mechanism leading to the formation of the 13C pocket, the major neutron source in low-mass AGB stars. In this regard, post-processing s-process models assuming that partial mixing of protons is induced by magneto-hydrodynamics processes were shown to reproduce many observations. Such mixing prescriptions have now been implemented in the FUNS code to compute stellar models with fully coupled nucleosynthesis. Here, we review the new generation of FRUITY models that include the effects of mixing triggered by magnetic fields by comparing theoretical findings with observational constraints available either from the isotopic analysis of trace-heavy elements in presolar grains or from carbon AGB stars and Galactic open clusters.
KW  - nucleosynthesis
KW  - s-process
KW  - asymptotic giant branch stars
KW  - stellar abundances
KW  - nuclear reaction cross-sections
KW  - chemically peculiar stars
KW  - circumstellar dust
KW  - magnetic fields
KW  - galactic chemical evolution
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/79486
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-794861
SN  - 2218-1997
N1  - This work was supported by the German-Israeli Foundation (GIF No. I-1500-303.7/2019).
N1  - Presolar grain data are from the Presolar Grain Database of the Laboratory for Space at Washington University in St. Louis, USA (https://presolar.physics.wustl.edu/presolar-grain-database (accessed on 2 December 2021)).
VL  - 8
IS  - 1, art. 16
SP  - 1
EP  - 20
PB  - MDPI
CY  - Basel
ER  -