论文标题
原始太阳能光晕的直接检测特征
Direct detection signatures of a primordial Solar dark matter halo
论文作者
论文摘要
暗物质重力与原始气体云结合的一小部分混合物可以绝热地收缩成近距离的轨道，其局部密度可与银河光环密度相当（甚至超过）。我们表明，今天将保留的“太阳晕”的大量部分（约25％）将保留下来，从木星和与地球的紧密相遇中幸存下来，并且可以在直接检测实验中观察到。与银河光环相比，人口将具有不同的特征，包括非标准的年度调制和极低的速度分散剂，这使其成为对超轻颗粒（例如轴或暗光子）相干或共振的检测的特别有趣的目标。
A small admixture of dark matter gravitationally bound to the proto-Solar gas cloud could be adiabatically contracted into Earth-crossing orbits with a local density comparable to (or even exceeding) the Galactic halo density. We show that a significant fraction (~25%) of the resulting 'Solar halo' would remain today, surviving perturbations from Jupiter and close encounters with Earth, and would be potentially observable in direct detection experiments. The population would have distinct signatures, including a nonstandard annual modulation and extremely low velocity dispersion compared with the Galactic halo, making it an especially interesting target for coherent or resonant detection of ultralight particles such as axions or dark photons.
