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Title:
Rotational mixing in tidally locked massive main sequence binaries
Authors:
de Mink, S. E.; Cantiello, M.; Langer, N.; Pols, O. R.
Publication:
Communications in Asteroseismology, Vol.158, p. 94 Proceedings of "38th Liege International Astrophysical Colloquium: Evolution and Pulsation of Massive Stars on the Main Sequence and Close to it", held on July 7-11 2008, edited by Arlette Noels, Conny Aerts, Josefina Montalban, Andrea Miglio and Maryline Briquet. (CoAst Homepage)
Publication Date:
07/2009
Origin:
AASP
Bibliographic Code:
2009CoAst.158...94D

Abstract

One of the main uncertainties in evolutionary calculations of massive stars is the efficiency of internal mixing. It changes the chemical profile inside the star and can therefore affect the structure and further evolution. We demonstrate that eclipsing binaries, in which the tides synchronize the rotation period of the stars and the orbital period, constitute a potentially strong test for the efficiency of rotational mixing. We present detailed stellar evolutionary models of massive binaries assuming the composition of the Small Magellanic Cloud. In these models we find enhancements in the surface nitrogen abundance of up to 0.6 dex.

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