Stellar Wind Feedback

大质量恒星是决定星系中星际介质的物理条件的关键因素。在局部尺度上，它们通过强烈的辐射、强风和超新星爆炸，迅速摧毁正在形成恒星的分子云。超新星反馈似乎是银河系规模上三种机制中的主导，但早期的前SN反馈似乎负责摧毁新生分子云并限制最大质量恒星的质量。恒星风反馈的重要性仍不确定。最近的工作表明，在热激波恒星风和周围物质之间的界面上的湍流混合可能会强烈冷却热气体，限制了这种反馈机制的强度。您将使用3D流体动力学模拟来研究这一过程。你的计算将使用最先进的代码，并利用利兹大学的高性能计算设施，可能还会使用其他地方。你将能够对湍流混合的重要性和恒星风反馈的有效性施加新的限制。

Massive stars are key agents in setting the physical conditions in the interstellar medium in galaxies. On local scales, they rapidly destroy star-forming molecular clouds through their intense radiation, powerful winds, and supernova explosions. Supernova feedback seems to be the dominant of the three mechanisms on galactic scales, but early, pre-SN feedback appears to be responsible for destroying the natal molecular cloud and in limiting the mass of the most massive stars. The importance of stellar wind feedback is still uncertain. Recent work has shown that turbulent mixing at the interface between the hot shocked stellar wind and surrounding material may strongly cool the hot gas, limiting the strength of this feedback mechanism. You will investigate this process using 3D hydrodynamical simulations. Your calculations will use a state-of-the-art code and make use of high-performance computing facilities at The University of Leeds and potentially elsewhere. You will be able to place new constraints on the importance of turbulent mixing and the effectiveness of stellar wind feedback.