Dependence of elliptic flows on transverse momentum and number of participants in Au+Au collisions at $\sqrt{\mathrm{\it s_{NN}}}$ = 200 GeV

We discuss the dependence of elliptic flow on transverse momentum and number of participating nucleons in the framework of a multi-source model, and argue that the geometry of an initial overlap region of interaction determines the measured azimuthal asymmetry. With the help of v2(PT) fitting, the participant nucleon number at a fixed impact parameter is calculated by a geometrical picture of the participant–spectator model. In the combined framework of the two models, our results are approximately in agreement with the experimental data.