Evidence for rotation-induced mixing in evolved intermediate mass stars

Details Evidence for rotation-induced mixing in evolved intermediate mass stars Evidence for rotation-induced mixing in evolved intermediate mass stars

2006-03-06

arxiv.org/abs/astro-ph/0603128v1

Astronomy and Astrophysics

Astrophysics

2 pages and 2 figures. Contributed talk to the XI Latin American Regional IAU meeting. To appear in Revista Mexicana de Astron

Scientific paper

Many observational results seem to indicate more efficient mixing processes in intermediate mass stars (5-20 M$_{\odot}$) than the expected by the standard models. These processes are usually thought to be caused by stellar rotation. Our recent analysis of 19 evolved intermediate mass stars has found them to display different efficiencies of internal mixing. The comparison of these results, and others from the literature, with rotating and non-rotating stellar evolutionary models led us to find, for the first time, an important correlation between stellar mass and the [N/C] ratio; the kind of correlation expected to be produced by a rotation-induced mixing.

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