The s-process at low metallicity

Richard J. Stancliffe*, Maria A. Lugaro, Amanda I. Karakas, Carlos Rijs

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    1 Citation (Scopus)


    We present models for the slow neutron-capture process (s-process) in asymptotic giant branch stars of metallicity [Fe/H] = -2.3 and masses 0.9 - 6M. The models where the 13C burns radiatively (stars of around 2M) produce an overall good match to carbon-enhanced metalpoor (CEMP) stars showing barium enhancements (CEMP-s). On the other hand, none of our models can provide a match to the composition of CEMP stars showing both barium and europium enhancements (CEMP-s/r). The models fail to reproduce the observed Eu abundances, and they also fail to reproduce the correlation between the Eu and Ba abundances. They also cannot match the ratio of heavy-to-light s-process elements observed in many CEMP-s/r stars, which can be more than 10 times higher than in the Solar System. This work has been published [1] and the interested reader should refer to that work for further details, included published tables of yields.

    Original languageEnglish
    Title of host publicationFirst Stars IV - From Hayashi to the Future -
    Number of pages4
    Publication statusPublished - 2012
    Event1st Stars IV: From Hayashi to the Future - Kyoto, Japan
    Duration: 21 May 201225 May 2012

    Publication series

    NameAIP Conference Proceedings
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616


    Conference1st Stars IV: From Hayashi to the Future


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