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arXiv 1808.09673astro-ph.SR
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星团中多星风的相互作用:势流

The interaction of multiple stellar winds in stellar clusters: potential flow

Klaus Scherer, Alexander Noack, Jens Kleimann, Horst Fichtner, Kertsin Weis

摘要:

虽然有几项研究调查了由多个恒星风的星团内相互作用产生的大规模星团风,但他们还没有提供给定星团内部边界流的细节。本文探讨了星团内多个恒星风相互作用产生的混合流的主要结构。复势理论被应用于分析调查驻点,个别外流之间的边界,和渐近大规模集群风的水动力结构。在第二部分中,这些平面的考虑扩展到完全三维的,非对称配置的风驱动星。我们发现:(i)可以区分由单个恒星风决定的大尺度星系团风区域;(ii)存在相对狭窄的外流通道;(iii)大尺度星系团风在大距离处渐近接近球对称。星团内部由多股恒星风相互作用产生的混合流是高度结构化的。

英文摘要:

While several studies have investigated large-scale cluster winds resulting from an intra-cluster interaction of multiple stellar winds, as yet they have not provided details of the bordering flows inside a given cluster. The present work explores the principal structure of the combined flow resulting from the interaction of multiple stellar winds inside stellar clusters. The theory of complex potentials is applied to analytically investigate stagnation points, boundaries between individual outflows, and the hydrodynamic structure of the asymptotic large-scale cluster wind. In a second part, these planar considerations are extended to fully three-dimensional, asymmetric configurations of wind-driving stars. We find (i) that one can distinguish regions in the large-scale cluster wind that are determined by the individual stellar winds, (ii) that there are comparatively narrow outflow channels, and (iii) that the large-scale cluster wind asymptotically approaches spherical symmetry at large distances. The combined flow inside a stellar cluster resulting from the interaction of multiple stellar winds is highly structured.

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