A theoretical review of centrality-dependent direct photon image spectra in Au+Au collisions at image

The recently published PHENIX data of direct photons at low image from Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC) energy image have attracted much theoretical interest. Here I review our theoretical calculation which successfully reproduces the measured image spectra of direct photons from Au+Au at different centralities over a wide image range, in order to show a close relation between hadronic observables and those of direct photons.