The Magnetic Fields T Tauri Stars

本项目采用了一种创新的技术，包括观察塞曼拓宽光学和红外吸收线，来测量年轻的金牛座T星表面的磁场强度和活跃区域的“填充因子”。分光光度法也用于量化表面场的时间变化和复杂的几何形状。这些观测结果将为当前的恒星“湍流发电机模型”提供强有力的约束，以解释年轻金牛座T星上磁场活动的起源和普遍性。它们也可能在理解吸积盘内界和年轻恒星光球之间的磁联系方面取得重大进展。

ABSTRACTJohns-Krull, ChristopherAST-9819772This project utilizes an innovative technique involving observations of Zeeman-broadened optical and infrared absorption lines to measure the magnetic field strength and active region 'filling factor' on the surfaces of young T Tauri stars. Spectrophotometry is also used to quantify the temporal variation and complex geometry of the surface fields. These observations will provide strong constraints on current stellar 'turbulent dynamo models' for the origin and pervasiveness of magnetic activity on young T Tauri stars. They also are also likely to lead to significant improvements in understanding the magnetic connection between the inner boundary of accretion disks and young stellar photospheres.