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Evolution of the rotational properties and nitrogen surface abundances of B-Type stellar populations

Granada, A. ; Meynet, G. ; Ekström, S. ; Georgy, C. ; Haemmerlé, L.

In: Proceedings of the International Astronomical Union, 2014, vol. 9, no. S307, p. 102-103

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    Titre
    • Evolution of the rotational properties and nitrogen surface abundances of B-Type stellar populations
    Auteur
    • Granada, A.. Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny, Switzerland email: anahi.granada@unige.ch
    • Meynet, G.. Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny, Switzerland email: anahi.granada@unige.ch
    • Ekström, S.. Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny, Switzerland email: anahi.granada@unige.ch
    • Georgy, C.. Astrophysics group, EPSAM, Keele University, Lennard-Jones Labs, Keele, ST5 5BG, UK
    • Haemmerlé, L.. Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny, Switzerland email: anahi.granada@unige.ch
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2014, vol. 9, no. S307, p. 102-103. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:296105
    Summary
    Stellar evolution models predict that rotation induces the mixing of chemical species, with the subsequent surface abundance anomalies relative to single non-rotating models, even during the main sequence (MS) evolution. The lack of measurable nitrogen surface enrichment in MS rotating stars, such as Be stars, has been interpreted as being in conflict with evolutionary models (e.g. Lennon et al. 2005; Hunter et al. 2008). In order to have an insight on the kind of ambient we do or we do not expect to find enriched rotating stars, we use our new population synthesis code, to produce synthetic intermediate-mass stellar populations fully accounting for stellar rotation effects, and study their evolution in time