The integrated HydroKinetic Model (iHKM) is applied to analyze the results of direct photon spectra as well as elliptic and triangular flow measurements in 200A GeV Au+Au collisions at RHIC for different centrality bins. Experiments detect the strong centrality dependence of photon elliptic and triangular flow as increasing $v_n(p_T)$-coefficients towards peripheral collisions. The photon production in the model is accumulated from the different sources along with the process of relativistic heavy ion collision developing. Those include the primary hard photons from the parton collisions at the very early stage of the process, the photons generated at the pre-thermal phase of dense matter evolution, then thermal photons at partially equilibrated hydrodynamic quark-gluon stage, together with radiation displaying a confinement and, finally, from the hadron gas phase. Along the way a hadronic medium evolution is treated in two distinct, in a sense opposite, approaches: chemically equilibrium and chemically non-equilibrium, namely, chemically frozen expansion. We find the description of direct photon spectra, elliptic and triangular flow are significantly improved, similar to that found in iHKM for the LHC energies, if an additional portion of photon radiation associated with the confinement processes, the “hadronization photons”, is included into consideration.

集成的水动力模型（iHKM）用于分析RHIC在不同中心区的200A GeV Au + Au碰撞中的直接光子光谱以及椭圆和三角流测量的结果。实验发现，随着光子椭圆和三角流的增加，强烈依赖于中心性$v_{ñ}（p_{Ť}）$-外围碰撞的系数。模型中光子的产生是随着相对论重离子碰撞发展的过程而从不同来源累积的。这些包括在过程的早期阶段parton碰撞产生的主要硬光子，在致密物质演化的预热阶段产生的光子，然后在部分平衡的流体动力学夸克-胶子阶段产生的热光子，以及显示限制，最后从强子气相开始。在一种相反的意义上，强子介质的演化沿两种不同的方法进行处理：化学平衡和化学非平衡，即化学冷冻膨胀。我们发现直接光子光谱的描述，椭圆和三角流得到了显着改善，