摘要: Lithium depletion as a function of time appears well established fact. After review the different physical processes which can be involved in this phenomenon, it that, very probably, stellar rotation does not play an important role. Stellar is dependant, lithium used clock measuring ages and provide relation between age, but requires calibration lithium-clock. This requests model burning. Internal waves carry angular momentum generate mixing process responsible for depletion. The remains to done.
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