论文标题
湖环的力量
The Power of Halometry
论文作者
论文摘要
天文弱重力镜头是对近半乳酸尺度上物质分布的有力探测，该尺度具有有关暗物质基本性质的重要信息。我们提出了一种新的方法，该方法利用角功率谱搜索由银河系亚哈洛斯（Subhalos）群体依赖于时间依赖的镜头引起的天体对象的明显运动模式。将此方法应用于即将到来的天文数据集将允许直接测量银河系子结构的性质，这对基础粒子物理学有影响。我们表明，通过近距离的天文观测，有可能在统计上检测到冷暗物质Subhalos，紧凑的物体以及由标量场暗物质产生的密度波动。使用正在进行的GAIA任务中的即将到来的数据，当前无限的参数空间将可以访问。
Astrometric weak gravitational lensing is a powerful probe of the distribution of matter on sub-Galactic scales, which harbor important information about the fundamental nature of dark matter. We propose a novel method that utilizes angular power spectra to search for the correlated pattern of apparent motions of celestial objects induced from time-dependent lensing by a population of Galactic subhalos. Application of this method to upcoming astrometric datasets will allow for the direct measurement of the properties of Galactic substructure, with implications for the underlying particle physics. We show that, with near-future astrometric observations, it may be possible to statistically detect populations of cold dark matter subhalos, compact objects, as well as density fluctuations sourced by scalar field dark matter. Currently-unconstrained parameter space will already be accessible using upcoming data from the ongoing Gaia mission.
