Accretion and Outflows of Rotating Magnetized Stars

这项研究集中在有磁场的旋转恒星中的吸积和流出。这类天体的例子包括年轻的金牛座T星、激变变星中的白矮星以及各种双星系统中的中子星。在这里，将进行理论和计算工作，其中将使用先进的建模代码，包括使用立方体球体数值网格的3D程序，来研究这些恒星之间的吸积和外流过程。具体目标是：(1)更好地了解盘状物质如何与恒星磁层相互作用，以及哪些不稳定性对将盘状物质发射到恒星的磁力线负有责任。(2)探索恒星磁层的多极结构如何影响吸积过程。以及(3)确定从磁化恒星发射流出的主要机制是什么。这里发展的技术和数值方法也将具有普遍价值，并适用于其他科学领域，如行星科学、地球物理、地球磁层科学、日光层科学和工程。青年科学家(包括本科生和研究生)将接受磁流体动力学方面的培训。一名研究助理也将得到支持，他除了与主要调查人员密切合作外，还将帮助学生教育。这项工作的结果将被纳入团体推广计划，包括在当地科学中心进行展示，以及正在为学童和教师制定的推广计划。

This research centers on accretion and outflow in rotating stars with magneticfields. Examples of such objects include young T Tauri stars, white dwarfs in cataclysmicvariables, and neutron stars in various binary systems. Here, a theoretical andcomputational effort will be undertaken in which advanced modeling codes, including a3D program using a cubed sphere numerical grid, will be used to investigate accretionand outflow processes among such stars. Specific goals are to: (1) Better understand howdisk material interacts with stellar magnetospheres, and which instabilities areresponsible for launching the disk matter to the magnetic field lines of the star. (2) Toexplore how the multipolar structure of a stellar magnetosphere influences the accretionprocess. And (3) to determine what is the dominant mechanism of launching outflowsfrom magnetized stars.The techniques and numerical methods developed here will also have general value andare applicable in other areas of science like planetary science, geophysics, earthmagnetospheric science, heliospheric science, and in engineering. Young scientists(including undergraduates and graduate students) will be trained inmagnetohydrodynamics. A research associate will also be supported who, in addition toworking closely with the Principle Investigators, will aid in the education of students.Results from this work will be incorporated into the groups outreach programs, includingand exhibit at the local Science Center and in an outreach program being developed forschool children and teachers.