CAREER: Evolution of magnetized stars

最近对我们的太阳和其他恒星的观察表明，需要新的方法来模拟恒星演化，充分考虑到恒星不可避免的磁化性质。Pascale Garaud博士(加州大学圣克鲁斯分校)将致力于构建一个多维恒星演化模型，该模型考虑了磁场、自转和所有其他相关的动力学效应。作为该项目的一部分，发展了一个新的数值模式，它将核演化方程的精确解耦合到大尺度上的内部流动和场的动态磁流体(MHD)模型，以及小尺度上经过充分检验和实验校准的湍流MHD闭合模型。这项新工作是加洛博士正在进行的恒星内部磁流体结构研究的自然延伸。Garaud和她的合作者还将举办一年一度的天体物理流体动力学(AFD)国际暑期学校和研讨会。该系列讲座将松散地仿照伍兹霍尔海洋研究所主办的世界著名的地球物理流体动力学暑期学校。讲座的重点是教授学生在渔农处某些类别的问题的理论(数学和计算)工具。在每一系列讲座结束时，将组织一个相关的科学研讨会，这次邀请理论家和观察员，从而以所研究主题的最先进的双重视角完成计划。会场将在不同的伙伴国之间轮换，以增强该计划的国际维度，并分担组织成本。讲座将在网上发布。

Recent observations of our own Sun as well as other stars suggest the need for new approach to modeling stellar evolution, which fully takes into account the inevitably magnetized nature of stars. Dr. Pascale Garaud (University of California - Santa Cruz) will work on the construction of a multidimensional stellar evolution model which takes into account magnetic fields, rotation and all other associated dynamical effects. As a part of this project a new numerical model developed which couples the exact solutions of the nuclear evolution equations to a dynamical magnetohydrodynamic (MHD) model for the internal flows and fields on the larger scales, and a well-tested and experimentally calibrated turbulent MHD closure model for the smaller scales. This new work is a natural extension of Dr. Garaud's ongoing research on the MHD structure of stellar interiors.Dr. Garaud and her collaborators will also launch a yearly international Summer School and Workshop in Astrophysical Fluid Dynamics (AFD). The lecture series will be loosely modeled on the world-renowned Geophysical Fluid Dynamics Summer School hosted by the Woods Hole Oceanographic Institution. The lectures will be focused on teaching students the theoretical (mathematical and computational) tools for certain classes of problems in AFD. A related scientific workshop will be organized at the end of each lecture series inviting this time both theorists and observers, thus completing the program with a state-of-the art dual perspective in the topic studied. The venue will alternate between different partner countries to enhance the international dimension of the program and share organizational costs. The lectures will be published on the web.