The directions of the galaxy angular momenta can be predicted from the initial conditions of the early Universe through the tidal torque. In simulations, these directions are well preserved through cosmic time, consistent with expectations of angular momentum conservation. We find evidence, statistically significant at ~3σ, of correlation between observed oriented directions of galaxy angular momentum vectors and their predictions based on the initial density field reconstructed from the positions of Sloan Digital Sky Survey galaxies. This study presents direct evidence for a correlation between directions of galaxy angular momenta and cosmic initial conditions, and opens a way to use measurements of galaxy spins to probe fundamental physics in the early Universe.

可以从早期宇宙的初始条件通过潮汐转矩来预测银河角动量的方向。在模拟中，这些方向在宇宙时间中得到了很好的保留，这符合对角动量守恒的期望。我们发现，在〜3σ时，具有统计意义的证据表明，银河角动量矢量的定向方向与其根据从斯隆数字天空测量星系位置重建的初始密度场进行的预测之间的相关性。这项研究为银河系角动量方向与宇宙初始条件之间的相关性提供了直接证据，并为使用银河系自旋的测量方法探索早期宇宙中的基本物理学开辟了途径。