| Two-fluid Dynamics in Clusters of Galaxies |
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| 作者姓名： | Yu-Qing LouNational Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina. |
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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 serf-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.
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| 关 键 词： | 暗物质 流体力学 银河系 喷射物丛聚 |
Two-fluid Dynamics in Clusters of Galaxies |
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| Yu-Qing LouNational Astronomical Observatories,Chinese Academy of Sciences,Beijing .Two-fluid Dynamics in Clusters of Galaxies[J].Chinese Journal of Astronomy and Astrophysics,2005,5(1):6-20. |
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| Authors: | Yu-Qing LouNational Astronomical Observatories Chinese Academy of Sciences Beijing |
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| Abstract: | 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. |
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| Keywords: | dark matter - hydrodynamics - ISM: general - galaxies: clusters -outflows winds - shocks |
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