Towards a Consistent Theory of Rotation and Mixing from the Pre-Main Sequence to the Horizontal Branch

Pinsonneault， Marc AST-9731621博士。Pinsonneault和Terndrup将通过开发理论模型来研究低质量恒星的恒星旋转和混合，这些理论模型结合了新的输入物理和模型角动量传输和混合，这些模型受到恒星丰度和旋转观测数据的限制。他们将从适合于主序星的模型开始，将混合场景应用于轻元素（尤其是锂）丰度作为年龄、旋转和组成的函数的问题。一个关键的目标是建立一个物理自洽模型，同时解释混合和角动量的演变。成功的主序模型将成为演化红巨星模型的起点，它将通过丰度异常和水平分支旋转的观测来检验这一理论。＊＊＊

Pinsonneault, Marc AST-9731621 Drs. Pinsonneault and Terndrup will study stellar rotation and mixing in low mass stars, by developing theoretical models that incorporate new input physics and model angular momentum transport and mixing, which are constrained by observed data on stellar abundances and rotation. They will begin with models appropriate to main-sequence stars, with application of mixing scenarios to the problem of light element (especially Lithium) abundances as a function of age, rotation, and composition. A key goal is to construct a physically self-consistent model which simultaneously explains both mixing and the evolution of angular momentum. Successful main-sequence models will then become the starting point for models of evolved red giant stars, which will test the theory with observations of abundance anomalies and horizontal branch rotation. ***