论文标题
不是那么模糊：不包括尺寸的FDM和超大矮星系的恒星运动学
Not so fuzzy: excluding FDM with sizes and stellar kinematics of ultra-faint dwarf galaxies
论文作者
论文摘要
我们使用对超明亮暗物质的颗粒质量的观察结果。在病毒化的“模糊”暗物质（FDM）中的波动干扰产生的潜在波动会动态加热UFD中的恒星轨道，其中一些旋转轨道呈$ \ lyssim $ 3 km/s，尺寸为$ \ ysim $ \ \ \ sillsim $ 40 PC。使用FDM光晕的模拟，以及在SEGUE 1和SEGUE 2 UFD中对大小和出色的径向速度的现有测量值，我们对$ M_ {FDM}> 3 \ times 10^{-19} $ EV的暗物质粒子质量的下限在99％的信心下，以99％的信心，在99％的信心下，在主机上均高于主机旋转光静脉循环。该约束是保守的，因为它是在孤子加热可以忽略不计的，并且没有其他非FDM恒星动力加热来增加速度分散剂。未来对超品种星系中其他恒星的光谱观察以及对孤子大小 - 质量关系的理论约束的限制，可以通过未来的光谱观察来加强它。但是，即使是当前对FDM质量的保守下限也使该模型与现有天文观测所探索的尺度上的冷暗物质无法区分。
We use observations of ultra-faint dwarf (UFD) galaxies to constrain the particle mass of ultra-light dark matter. Potential fluctuations created by wave interference in virialized "fuzzy" dark matter (FDM) halos dynamically heat stellar orbits in UFDs, some of which exhibit velocity dispersions of $\lesssim$ 3 km/s and sizes $\lesssim$ 40 pc. Using simulations of FDM halos, and existing measurements of sizes and stellar radial velocities in Segue 1 and Segue 2 UFDs, we derive a lower limit on the dark matter particle mass of $m_{fdm} > 3\times 10^{-19}$ eV at 99% confidence, marginalized over host halo circular velocity. This constraint is conservative as it is derived under the assumption that soliton heating is negligible, and that no other sources of non-FDM dynamical heating of stars operate to increase velocity dispersion. It can potentially be strengthened by future spectroscopic observations of additional stars in ultra-faint galaxies and by tightening theoretical constraints on the soliton size-halo mass relation. However, even the current conservative lower limit on the FDM mass makes this model indistinguishable from Cold Dark Matter at the scales probed by existing astronomical observations.
