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Chemical mixing by turbulent convection in the overshooting region below the convective envelope of RGB stars |
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| Authors: | Xiang-Jun Lai Yan Li National Astronomical Observatories /Yunnan Observatory Chinese Academy of Sciences Kunming China Key Laboratory for the Structure Evolution of Celestial Objects China Graduate University of Chinese Academy of Sciences Beijing |
| Institution: | Xiang-Jun Lai1,2,3 and Yan Li1,2 1 National Astronomical Observatories /Yunnan Observatory,Chinese Academy of Sciences,Kunming 650011,China,2 Key Laboratory for the Structure and Evolution of Celestial Objects,China 3 Graduate University of Chinese Academy of Sciences,Beijing 100049 |
| Abstract: | Based on the turbulent convection model(TCM),we investigate chemical mixing in the bottom overshooting region of the convective envelope of intermediatemass stars,focusing on its influence on the formation and extension of blue loops in the Hertzsprung-Russell(HR) diagram.A diffusive mixing model is adopted during the Red Giant Branch(RGB) phase.The properties of the blue loop are changed by modification of the element profiles above the H-burning shell,which results from the incomplete mixing in the bottom... |
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