The end point of the collapse and relaxation of a protogalaxy is a dark matter halo, inside of which the baryonic gas is in hydrostatic equilibrium at a temperature of typically a few million degrees.
原星系塌缩与松弛的最终点就是黑暗物质晕,里有
于流体静力平衡的重子气体,一般温度约数
万度。