标题： 具有双重质量分布的星系的旋转动力学 显示英文标题

标题： Rotation Dynamics of a Galaxy with a Double Mass Distribution

摘要： 螺旋星系的旋转动力学通过两个质量分布的总和来建模：一个球状凸起和一个薄盘。 代表这些质量分布的密度函数是根据星系的总角动量和已知的旋转曲线计算得出的。 当假设凸起和盘的密度函数都平滑且在星系边缘之外赋予零值时，得到了唯一解。 此外，计算出的密度函数表明，常数旋转曲线是由几乎呈指数分布的光度轮廓产生的，并伴随着暗物质分布，该分布遵循发光物质的分布，无需修改牛顿动力学。 分子氢在螺旋星系中的实验检测证实了与该模型所得结果一致的大质量重子组分的存在。 提出暗物质不必是非重子的奇异物质。 相反，它可以由分子氢和凝聚态物质组成。 显示英文摘要

摘要： The rotation dynamics of spiral galaxies is modeled using a sum of two mass distributions: a spherical bulge and a thin disk. The density functions representing these mass distributions are calculated from the total angular momentum of the galaxy and known rotation curves. When both bulge and disk density functions are assumed to be smooth and are given a value of zero beyond the edge of the galaxy, a unique solution is obtained. Moreover, the calculated density functions show that constant rotation curves are obtained from a nearly exponential luminosity profile with a dark matter distribution which follows that of the light emitting matter, without the need for modified Newtonian dynamics. Experimental detection of molecular hydrogen in spiral galaxies confirms the presence of a baryonic massive component consistent with the results obtained with this model. It is proposed that dark matter does not have to be exotic non-baryonic matter. Instead, it can be made of molecular hydrogen and condensed matter.