脉冲天体物理喷流与小尺度非均匀介质的相互作用
The Interaction Between a Pulsed Astrophysical Jet and Small-Scale Heterogeneous Media
摘要：
我们已经进行了2D流体动力学模拟脉冲天体物理射流传播通过介质，填充与球形不均匀性，或“团块”，这是小于射流半径。可以看出，团块以几种方式影响射流，例如阻碍射流传播和使射流偏离轴线。虽然有一些争论，这些类型的凝聚在ISM或分子云中的流行，探索这一区域的参数空间，但都显示了这些团块破坏天体物理喷流的潜力，并产生恢复赫比格-哈罗天体最近的观测方面的结果。我们发现，射流的传播和涡诱导的团块/环境介质中的相关性以及与“动态填充函数”$f_d$在所有的模拟。
英文摘要：
We have performed 2D hydrodynamic simulations of a pulsed astrophysical jet propagating through a medium that is populated with spherical inhomogeneities, or "clumps," which are smaller than the jet radius. The clumps are seen to affect the jet in several ways, such as impeding jet propagation and deflecting the jet off-axis. While there has been some debate as to the prevalence of these types of condensations in the ISM or in molecular clouds, the exploration of this region of parameter space nonetheless both shows the potential for these clumps to disrupt astrophysical jets and yields results which recover aspects of recent observations of Herbig-Haro objects. We find that the propagation of the jet and the vorticity induced in the clump/ambient medium correlate well with a "dynamic filling function" $f_d$ across all the simulations.
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