论文标题
斯巴鲁通过不同的镜头：通过延长的暗物质结构进行微透明
Subaru through a different lens: microlensing by extended dark matter structures
论文作者
论文摘要
我们研究了由有限大小的源星前面的空间扩展对象产生的重力微透明信号。最有趣的特征是与设置的爱因斯坦半径相当的镜头和源尺寸。使用这些信息，我们从Subaru-HSC对M31的调查中获得了对小行星NFW Subhalos和玻色子星的暗物质种群到地球质量的约束。这些镜头概述捕获了各种暗物质子结构的定性行为。我们发现，对于半径0.1 $ r_ \ odot $且更大的镜头，与点状透镜（例如原始黑洞和大男子气概）的约束偏差变得可见，并且镜片上的上限会随着镜片的增加而弱化的晶状体质量。
We investigate gravitational microlensing signals produced by a spatially extended object transiting in front of a finite-sized source star. The most interesting features arise for lens and source sizes comparable to the Einstein radius of the setup. Using this information, we obtain constraints from the Subaru-HSC survey of M31 on the dark matter populations of NFW subhalos and boson stars of asteroid to Earth masses. These lens profiles capture the qualitative behavior of a wide range of dark matter substructures. We find that deviations from constraints on point-like lenses (e.g. primordial black holes and MACHOs) become visible for lenses of radius 0.1 $R_\odot$ and larger, with the upper bound on lens masses weakening with increasing lens size.
