Angular Momentum Evolution and the Origin of Rotation in Stars
Angular Momentum Evolution and the Origin of Rotation in Stars
批准号:
0206008
负责人:
Marc Pinsonneault
金额:
$15.93万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2002
资助国家:
美国
项目状态:
已结题
起止时间:
2002-06-15 至 2006-05-31
中文摘要
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英文摘要
PI PinsonneaultThere has been extensive recent observational and theoretical work on the angularmomentum evolution of low mass stars. The initial distribution of protostellar rotation rates can provide clues about the star formation process and the interaction of T Tauri stars with their circumstellar accretion disks. Rotation is intimately connected with the generation of stellar magnetic fields, and the spindown of stars can be used to study angular momentum loss from a magnetized stellar wind. Internal transport of material and of angular momentum has several sources (hydrodynamic, magnetic, and induced by gravity waves); this transport produces mixing that can strongly modify the surface abundances of stars. The sheer variety of physical effects associated with stellar rotation makes the subject complex. Fortunately, there are numerous observational constraints on theoretical models of angular momentum evolution, and recent work has established a theoretical framework for interpreting these data. This study is a combined theoretical and observational program on stellar rotation. The goals of this work are to improve the physics in models of angular momentum evolution and to provide new calibrating data for the models. ***
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Towards a Consistent Theory of Rotation and Mixing from the Pre-Main Sequence to the Horizontal Branch
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批准号:9731621
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项目类别:Standard Grant
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资助金额:$10.2万
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财政年份:1998
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负责人:Marc Pinsonneault
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依托单位:
海外基金