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arXiv 1106.2262astro-ph.CO
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暗物质的状态方程

An equation of state for dark matter

Christian Fronsdal, Thomas J. Wilcox

摘要:

暗物质被认为存在于许多星系中,被解释为与引力场相互作用的流体动力学系统。状态方程决定了质量分布和相关的引力场。相反,引力场可以从观测银河系中恒星的轨道速度中推断出来,在第一近似中,引力场主要是由于暗物质的分布。在这种近似中,状态方程由引力场通过运动方程确定。由此产生的状态方程是一个简单的表达式,说明了银河系旋转曲线的主要特征超过6个数量级。

英文摘要:

Dark matter, believed to be present in many galaxies, is interpreted as a hydrodynamical system in interaction with the gravitational field and nothing else. An equation of state determines the mass distribution and the associated gravitational field. Conversely, the gravitational field can be inferred from observation of orbital velocities of stars in the Milky Way, in a first approximation in which the field is mainly due to the distribution of dark matter. In this approximation, the equation of state is determined by the gravitational field via the equations of motion. The resulting equation of state is a simple expression that accounts for the main features of the galactic rotation curve over 6 orders of magnitude.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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