The nature of s-process nucleosynthesis in low mass AGB stars based on individual Barium star observations

Barium stars are now primaries in a binary system with a former asymptotic giant branch (AGB) star. Here we compare some available AGB nucleosynthesis models and the observed s-process abundances of individual Ba star measurements to constrain the nature of the s-process in low mass AGB stars. After...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1668; no. 1; pp. 12009 - 12012
Main Authors Cseh, B, Vil´agos, B, Lugaro, M, D'Orazi, V, Karakas, A I, Pereira, C B
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2020
Subjects
Abundance
abundances
Asymptotic giant branch stars
Barium
Binary stars
Dilution
Nuclear fusion
nuclear reactions
nucleosynthesis
Physics
stars: abundances
stars: AGB and post-AGB
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Summary:Barium stars are now primaries in a binary system with a former asymptotic giant branch (AGB) star. Here we compare some available AGB nucleosynthesis models and the observed s-process abundances of individual Ba star measurements to constrain the nature of the s-process in low mass AGB stars. After correcting the models with a dilution factor calculated for [Ce/Fe], we found that some of the sample stars show higher abundances for light s-process elements than the model predictions. This might be attributed to diffusive mixing in the stars.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1668/1/012009