The composition of Barium stars and the s-process in AGB stars

Borbála Cseh, Maria Lugaro, Valentina D'Orazi, Denise B. De Castro, Claudio B. Pereira, Amanda I. Karakas, László Molnár, Emese Plachy, Róbert Szabó, Marco Pignatari, Sergio Cristallo

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


Using abundances from the available largest, homogeneous sample of high resolution Barium (Ba) star spectra we calculated the ratios of different hs-like to ls-like elemental ratios and compared to different AGB nucleosynthesis models. The Ba star data show an incontestable increase of the hs-type/ls-type element ratio (for example, [Ce/Y]) with decreasing metallicity. This trend in the Ba star observations is predicted by low mass, non-rotating AGB models where 13C is the main neutron source and is in agreement with Kepler asteroseismology observations.

Original languageEnglish
Title of host publicationProceedings of the International Astronomical Union
EditorsFranz Kerschbaum, Martin Groenewegen, Hans Olofsson
Place of PublicationUnited Kingdom
PublisherCambridge University Press
Number of pages4
ISBN (Print)9781108471527
Publication statusPublished - 30 Dec 2019
EventInternational Astronomical Union: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time - Vienna, Austria
Duration: 20 Aug 201823 Aug 2018
Conference number: 343

Publication series

NameProceedings of the International Astronomical Union
PublisherCambridge University Press
ISSN (Print)1743-9213


ConferenceInternational Astronomical Union
Internet address


  • abundances
  • nuclear reactions
  • nucleosynthesis
  • Stars: Abundances
  • stars: AGB and post-AGB

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