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Two-fluid Dynamics in Clusters of Galaxies

机译:星系团中的双流体动力学

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摘要

We develop a theoretical formulation for the large-scale dynamics of galaxy clusters involving two spherical 'isothermal fluids' coupled by their mutual gravity and derive asymptotic similarity solutions analytically. One of the fluids roughly approximates the massive dark matter halo, while the other describes the hot gas, the relatively small mass contribution from the galaxies being subsumed in the gas. By properly choosing the self-similar variables, it is possible to consistently transform the set of time-dependent two-fluid equations of spherical symmetry with self-gravity into a set of coupled nonlinear ordinary differential equations (ODEs). We focus on the analytical analysis and discuss applications of the solutions to galaxy clusters.
机译:我们为涉及两个球形“等温流体”及其相互引力的星系团的大规模动力学开发了理论公式,并通过分析得出了渐近相似解。一种流体大致近似于大量的暗物质晕,而另一种描述了热气体,星系中相对较小的质量贡献被包含在气体中。通过适当选择自相似变量,可以将具有自重的球形对称时间相关的两流体方程组一致地转换为一组耦合的非线性常微分方程(ODE)。我们专注于分析分析,并讨论解决方案在银河星团中的应用。

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