双组分射流模拟：结合分析和数值方法
Two-component jet simulations: Combining analytical and numerical approaches
摘要：
最近的观测以及对YSO喷流的理论研究表明，存在两个稳定的成分：一个盘风型外流需要解释所观察到的高质量损失率和恒星风型外流可能占所观察到的恒星自旋下降。在这个框架内，我们构建了数值两个组件喷流模型，适当混合的分析磁盘风的解决方案与互补的解析导出恒星外流。它们的组合由空间和时间参数控制，以解决不同的物理条件和时间变量特征。我们研究的时间演化和相互作用的两个射流组件上的小尺度和大尺度。模拟达到接近初始解的稳态配置。虽然时间的变化没有发现显着影响的动力学，流动波动产生冷凝，其大尺度结构有很强的相似性，观察到的YSO喷气结。
英文摘要：
Recent observations as well as theoretical studies of YSO jets suggest the presence of two steady components: a disk wind type outflow needed to explain the observed high mass loss rates and a stellar wind type outflow probably accounting for the observed stellar spin down. In this framework, we construct numerical two-component jet models by properly mixing an analytical disk wind solution with a complementary analytically derived stellar outflow. Their combination is controlled by both spatial and temporal parameters, in order to address different physical conditions and time variable features. We study the temporal evolution and the interaction of the two jet components on both small and large scales. The simulations reach steady state configurations close to the initial solutions. Although time variability is not found to considerably affect the dynamics, flow fluctuations generate condensations, whose large scale structures have a strong resemblance to observed YSO jet knots.
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