TY  - JOUR
A1  - Vescovi, Diego
A1  - Cristallo, Sergio
A1  - Palmerini, Sara
A1  - Abia, Carlos
A1  - Busso, Maurizio
T1  - Fluorine nucleosynthesis and s-processing in AGB stars driven by magnetic-buoyancy mixing
T2  - EPJ Web of Conferences
N2  - Asymptotic giant branch (AGB) stars are thought to be among the most important sources of fluorine in our Galaxy. While observations and theory agree at close-to-solar metallicity, stellar models overestimate fluorine production in comparison to heavy elements at lower metallicities. We present predictions for 19F abundance for a set of AGB models with various masses and metallicities, in which magnetic buoyancy induces the formation of the 13C neutron source (the so-called 13C pocket). In our new models, fluorine is mostly created as a consequence of secondary 14N nucleosynthesis during convective thermal pulses, with a minor contribution from the 14N existing in the 13C pocket zone. As a result, AGB stellar models with magnetic-buoyancyinduced mixing show low 19F surface abundances which agree with fluorine spectroscopic observations at both low and near-solar metallicity.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69941
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-699418
SN  - 2100-014X
VL  - 260
IS  - 11009
PB  - EDP Sciences
CY  - Les Ulis
ER  -