流体静力平衡中的光致电离气体：重力的作用
Photoionized gas in hydrostatic equilibrium: the role of gravity
摘要：
本文提出了一种在等离子体物理程序Cloudy中考虑重力效应的方法。更准确地说，一个术语被添加到所需的气体压力，以加强流体静力学平衡，考虑到气体的自重和可选的外部电势的存在。作为一个测试的情况下，被认为是一个平面平行模型的垂直结构的银河系盘附近的太阳邻域。结果表明，引力决定了盘的刻度高度，它在设置其整体化学成分中起着关键作用。然而，其他变量，如入射连续体的形状和银河磁场的强度，强烈影响预测的结构。
英文摘要：
We present a method to include the effects of gravity in the plasma physics code Cloudy. More precisely, a term is added to the desired gas pressure in order to enforce hydrostatic equilibrium, accounting for both the self-gravity of the gas and the presence of an optional external potential. As a test case, a plane-parallel model of the vertical structure of the Milky Way disk near the solar neighbourhood is considered. It is shown that the gravitational force determines the scale height of the disk, and it plays a critical role in setting its overall chemical composition. However, other variables, such as the shape of incident continuum and the intensity of the Galactic magnetic field, strongly affect the predicted structure.
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