SCYON Abstract

Received on December 12 2005

Influence of gravity waves on the internal rotation and Li abundance of solar type stars

Authors	Corinne Charbonnel(¹) and Suzanne Talon(²)
Affiliation	(¹)Geneva Observatory (²)University of Montreal
Accepted by	Astronomy & Astrophysics
Contact	Corinne.Charbonnel@obs.unige.ch
URL	http://obswww.unige.ch/~charbonn/
Links	Praesepe / Hyades / IC 4651 / NGC 752 / M67

Abstract

The Sun's rotation profile and lithium content have been difficult to understand in the context of conventional models of stellar evolution. Classical hydrodynamical models predict that the solar interior must rotate highly differentially, in disagreement with observations. It has recently been shown that internal waves produced by convection in solar-type stars produce an asymmetric, shear layer oscillation, similar to Earth's quasi-biennial oscillation, that leads to efficient angular momentum redistribution from the core to the envelope. We presents results of a model that successfully reproduces both the rotation profile and the surface abundance of lithium in solar-type stars of various ages.