论文标题
观察性检测星系旋转与初始条件之间的相关性
Observational detection of correlation between galaxy spins and initial conditions
论文作者
论文摘要
可以从早期宇宙的初始条件通过潮汐张量转换来预测星系旋转。在模拟中，它们的方向通过宇宙时间得到了很好的保存，与对角动量保护的期望一致。我们报告了基于从SDSS星系的位置重建的初始密度场，基于观察到的星系角矩的定向方向的相关性检测$ \ sim3σ$检测。该检测是由一组由星系动物园分类为（反）顺时针的螺旋星系驱动的，从添加漫画和萨米岛调查的星系的情况下进行了适度的改进。这是对定向星系自旋方向的第一次这种检测，它开辟了一种使用星系旋转测量的方法来探测早期宇宙中的基本物理。
Galaxy spins can be predicted from the initial conditions in the early Universe through the tidal tensor twist. In simulations, their directions are well preserved through cosmic time, consistent with expectations of angular momentum conservation. We report a $\sim 3 σ$ detection of correlation between observed oriented directions of galaxy angular momenta and their predictions based on the initial density field reconstructed from the positions of SDSS galaxies. The detection is driven by a group of spiral galaxies classified by the Galaxy Zoo as (anti-)clockwise, with a modest improvement from adding galaxies from MaNGA and SAMI surveys. This is the first such detection of the oriented galaxy spin direction, which opens a way to use measurements of galaxy spins to probe fundamental physics in the early Universe.
