An adaptive-mesh, GPU-accelerated, and optimally error-controlled special relativistic hydrodynamics code

GAMER-SR, a new special-relativistic hydrodynamic code incorporating adaptive-mesh-refinement (AMR) and enabling GPU-acceleration, is presented. The novelty of this code stems from its capability to deal with coexisting ultra-relativistically hot gases and non-relativistically cool gases, such as those in the HII region. It is the regime where most existing codes have failed to address. GAMER-SR can also handle the problem involving large Lorentz factor, e.g., 10⁶ and optimally avoid numerical errors. With this code, two interesting and challenging astrophysical problems are tested: (a) the flow acceleration and limb-brightening of relativistic jets, and (b) the effects of asymmetric explosion source on the relativistic blast wave.