磁层-磁层相互作用和外流：锥形风和轴向喷流
Disk-Magnetosphere Interaction and Outflows: Conical Winds and Axial Jets
摘要：
我们研究外流的磁盘磁层边界的旋转磁化恒星的情况下，一个明星的磁场是聚束成X型配置使用轴对称和全三维MHD模拟。如果盘中的粘滞系数大于扩散系数，或者盘中的吸积速率增大，就会出现这种结构。锥形流出物从圆盘的内边缘流向开口角为30-45度的窄壳。外流携带着0.1-0.3的盘质量和部分盘的角动量向外。在不同周期的恒星周围会出现锥形外流，但是在“螺旋桨”状态的恒星中，会出现一个额外的-更快的分量：轴向喷流，其中物质在距离恒星很小的距离上被恒星表面上方的磁压力加速到非常高的速度。探索性的3D模拟表明，锥形外流是对称的旋转轴的磁盘，即使磁偶极子是显着错位。锥形外流和轴向喷流可能出现在不同类型的年轻恒星中，包括I类年轻恒星、经典金牛座T星和EXOR。
英文摘要：
We investigate outflows from the disk-magnetosphere boundary of rotating magnetized stars in cases where the magnetic field of a star is bunched into an X-type configuration using axisymmetric and full 3D MHD simulations. Such configuration appears if viscosity in the disk is larger than diffusivity, or if the accretion rate in the disk is enhanced. Conical outflows flow from the inner edge of the disk to a narrow shell with an opening angle 30-45 degrees. Outflows carry 0.1-0.3 of the disk mass and part of the disk's angular momentum outward. Conical outflows appear around stars of different periods, however in case of stars in the "propeller" regime, an additional - much faster component appears: an axial jet, where matter is accelerated up to very high velocities at small distances from the star by magnetic pressure force above the surface of the star. Exploratory 3D simulations show that conical outflows are symmetric about rotational axis of the disk even if magnetic dipole is significantly misaligned. Conical outflows and axial jets may appear in different types of young stars including Class I young stars, classical T Tauri stars, and EXors.
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