The study of anisotropic flow provides strong constrains to the evolution of the medium produced in heavy ion collisions and its event-by-event geometry fluctuations. These observables have long been related to collective behaviour in the formed medium. Recent results both at RHIC and LHC provide strong evidence for the formation of such medium in smaller systems.
RHIC has had a broad program to study the physics of small systems by systematically varying the collision energy and Ion configuration for a better understanding of the underlying physics. PHENIX recorded data from d+Au collisions at 200GeV and smaller energies in 2016 using a special trigger which enhances statistics for the very central collisions. Here we show our recent anisotropic flow measurements for fully reconstructed $\pi^0$ at $-0.35<\eta<+0.35$ in d+Au collisions.