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Barbara J. Anthony-Twarog on Muck Rack

Barbara J. Anthony-Twarog

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Subgiants in NGC 188 reveal that rotationally induced mixing creates the main sequence Li-Dip - Nature Communications

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By Qinghui Sun, Constantine P. Deliyannis, Barbara J. Anthony-Twarog, Bruce A. Twarog, Xiao-Tian Xu, Aaron Steinhauer
| Nature Verified
Abstract The Lithium-Dip is a severe lithium depletion observed in mid-F (6200-6650 K) dwarfs, which has puzzled astronomers since it was discovered in 1986. Proposed mechanisms include effects related to rotation, magnetic fields, diffusion, gravity waves, and mass loss. Which, if any, of these is realistic remains unclear. Here we show that mixing due to shear induced by stellar angular momentum loss is the unique mechanism driving the lithium depletion.
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