@misc{10481/70828,
year = {2021},
month = {8},
url = {http://hdl.handle.net/10481/70828},
abstract = {Asymptotic giant branch (AGB) stars are considered to be among the most significant contributors to the fluorine budget in our Galaxy. While observations and theory agree at close-to-solar metallicity, stellar models at lower metallicities overestimate the fluorine production with respect to that of heavy elements. We present F-19 nucleosynthesis results for a set of AGB models with different masses and metallicities in which magnetic buoyancy acts as the driving process for the formation of the C-13 neutron source (the so-called C-13 pocket). We find that F-19 is mainly produced as a result of nucleosynthesis involving secondary N-14 during convective thermal pulses, with a negligible contribution from the N-14 present in the C-13 pocket region. A large F-19 production is thus prevented, resulting in lower fluorine surface abundances. As a consequence, AGB stellar models with mixing induced by magnetic buoyancy at the base of the convective envelope agree well with available fluorine spectroscopic measurements at low and close-to-solar metallicity.},
organization = {German-Israeli Foundation for Scientific Research and Development	I-1500-303.7/2019},
organization = {Agencia Estatal de Investigacion of the Spanish Ministerio de Ciencia e Innovacion through the FEDER founds projects	PGC2018-095317-B-C2},
publisher = {EDP Science},
keywords = {Abundances},
keywords = {AGB and post-AGB},
keywords = {Magnetic field},
keywords = {Magnetohydrodynamics (MHD)},
keywords = {Carbon},
keywords = {Nuclear reactions},
keywords = {Nucleosynthesis},
keywords = {Abundances},
title = {Magnetic-buoyancy-induced mixing in AGB stars: Fluorine nucleosynthesis at different metallicities},
doi = {10.1051/0004-6361/202141173},
author = {Vescovi, D. and Abia Ladrón De Guevara, Carlos Antonio},
}