申报标题：Galaxy spins and their probe of the primordial Universe
摘要：In this talk I will discuss the galaxy angular momenta — their origin, observation, prediction, and they as a potential probe of the primordial Universe. In the current and upcoming galaxy surveys we have focused on galaxies’ positions and velocities. Galaxies also have rotations and we can use these information to learn more about the Universe. In Lagrangian space the protohalo spins are well described by the tidal torque theory, and numerical simulations have given a general picture of spin conservation over galaxy formation. We have verified the correlation between observed galaxy spins and cosmic initial conditions (density mode reconstruction by ELUCID). We have also proposed the potential detection of neutrino mass, possible parity violation via galaxy spins in Lagrangian space.