Reference : Chemical abundances of fast-rotating OB stars
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/171613
Chemical abundances of fast-rotating OB stars
English
Cazorla, Constantin mailto [Université de Liège - ULiège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Morel, Thierry mailto [Université de Liège - ULiège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Nazé, Yaël mailto [Université de Liège - ULiège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Rauw, Grégor mailto [Université de Liège - ULiège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
23-Jun-2014
No
International
IAU Symposium 307 : New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry
23-27 June 2014
University of Geneva
Geneva
Switzerland
[en] Massive stars abundances ; Fundamental parameters ; Rotation
[en] Fast rotation in massive stars is predicted to induce mixing in their interior, but recent observations have challenged this concept by revealing a population of fast-rotating stars with normal nitrogen abundances at their surface (Hunter et al. 2009, A&A, 496, 841; Brott et al. 2011, A&A, 530, A116, but see Maeder et al. 2014, A&A, 565, A39). However, as the binary fraction of these stars is unknown, the importance of mass-transfer processes cannot be quantified. As a result, no definitive statements about the ability of single-star evolutionary models including rotation to reproduce these observations can be made. Our work combines for the first time a detailed surface abundance analysis with a radial-velocity monitoring for a sample of bright, fast-rotating Galactic OB stars to put strong constraints on stellar evolutionary and interior models.
Liège Space Research Institute - LiSRI
ARC grant financed by the Federation Wallonia-Brussels.
Abundances of fast-rotating massive stars
Researchers ; Professionals
http://hdl.handle.net/2268/171613

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