SNSPH: A Parallel 3-D Smoothed Particle Radiation Hydrodynamics Code

We provide a description of the SNSPH code—a parallel 3-dimensional radiation hydrodynamics code implementing treecode gravity, smooth particle hydrodynamics, and flux-limited diffusion transport schemes. We provide descriptions of the physics and parallelization techniques for this code. We present performance results on a suite of code tests (both standard and new), showing the versatility of such a code, but focusing on what we believe are important aspects of modeling core-collapse supernovae. Subject headings: methods: numerical — methods: N-body simulations — supernovae: general