论文标题
从银河系的旋转曲线限制模糊暗物质的质量
Constraint on the mass of fuzzy dark matter from the rotation curve of the Milky Way
论文作者
论文摘要
模糊的暗物质（FDM）是最近的暗物质模型之一。根据该模型，暗物质是由非常轻的标量颗粒制成的，对银河系尺度具有相当大的量子机械作用，这解决了冷暗物质（CDM）的许多问题。在这里，我们使用来自银河系（MW）星系的旋转曲线的观察到的数据来比较FDM和CDM模型的结果。我们显示FDM在靠近凸起中心的旋转曲线上增加了一个局部峰，在该曲线的位置和幅度取决于FDM颗粒的质量。通过将观察到的旋转曲线与FDM的期望拟合，我们发现FDM的质量为$ M = 2.5^{+3.6} _ { - 2.0} \ times10^{ - 21} $ ev。我们注意到，MW中旋转曲线的局部峰也可以在CDM模型中使用MW Galaxy的额外内部凸起模型来解释。我们得出的结论是，FDM模型解释了这一峰，而无需凸起的额外结构。
Fuzzy Dark Matter (FDM) is one of the recent models for dark matter. According to this model, dark matter is made of very light scalar particles with considerable quantum mechanical effects on the galactic scale, which solves many problems of the cold dark matter (CDM). Here we use the observed data from the rotation curve of the Milky Way (MW) Galaxy to compare the results from FDM and CDM models. We show FDM adds a local peak on the rotation curve close to the center of the bulge, where its position and amplitude depend on the mass of FDM particles. By fitting the observed rotation curve with our expectation from FDM, we find that the mass of FDM is $m = 2.5^{+3.6}_{-2.0} \times10^{-21}$eV. We note that the local peak of the rotation curve in MW can also be explained in the CDM model with an extra inner bulge model for the MW Galaxy. We conclude that the FDM model explains this peak without a need for extra structure for the bulge.
