The azimuthal anisotropy of electrons from heavy flavor decays in $\sqrt{s_{NN}}$ = 200 GeV Au-Au collisions by PHENIX

The azimuthal anisotropy of particle emissions is a powerful tool to study the early stage of ultra-relativistic nuclear collisions. Previous measurements of $v_{2}$ for hadrons made of light quarks, such as pions and kaons, are consistent with the quark coalescence model, which assumes that hadrons derive their $v_{2}$ from the quarks that form them. This suggests that the $v_{2}$ already develops in the partonic phase for hadrons made of light quarks. In addition if the $v_{2}$ of heavy flavor is non-zero, it would suggest partonic level thermalization and very high density at the early stage of the collisions. In this presentation, we will show the azimuthal anisotropy of heavy flavor by measuring the electron $v_{2}$ from semi- leptonic charm decays in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV in RHIC-RUN4 and compare with several theoretical predictions.