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We present elliptic flow, $v_2$, measurements for charged and identifiedparticles at midrapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5 and39 GeV at STAR. We compare the inclusive charged hadron $v_2$ to those fromhigh energies at RHIC ($\sqrt{s_{NN}}$ = 62.4 and 200 GeV), at LHC($\sqrt{s_{NN}}$ = 2.76 TeV). A significant difference in $v_2$ between baryonsand anti-baryons is observed and the difference increases with decreasing beamenergy. We observed the $v_2$ of $\phi$ meson is systematically lower thanother particles in Au+Au collisions at $\sqrt{s_{NN}}$ = 11.5 GeV.

The elliptic flow in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5 and 39 GeV at STAR