Time Scales for Lithium Depletion and Rotational Braking in Solar-Type Main-Sequence Stars

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Science  05 Mar 1971:
Vol. 171, Issue 3974, pp. 895-896
DOI: 10.1126/science.171.3974.895


The new age determination of 9 x 108 years for the Hyades yields an e-folding time for lithium depletion in G dwarfs of 1.1 x 109 years and an e-folding time for rotational braking of around 2.2 x 109 years. A proposal is made that the change in solar rotation over the past 250 million years be determined by analyzing petrified trees.