2006/01/27 by Hajime Susa · 65 citations
Engineering · Physics and Astronomy · #Astrophysics #Astrophysics and Star Formation Studies #Classical mechanics #Code (set theory) #Computational Fluid Dynamics and Aerodynamics #Computational physics #Computational science #Computer science #Electromagnetic Scattering and Analysis #Ideal (ethics) #Nuclear physics #Parallel computing #Particle (ecology) #Physics #Programming language #Quantum mechanics #Radiation #Radiative transfer #Smoothed-particle hydrodynamics #Solver #Speedup #Test particle #astro-ph
paper · pdf · doi:10.1093/pasj/58.2.445
published in Publications of the Astronomical Society of Japan 58(2), 445-460 (Oxford University Press) · 19pages, 10figures, PASJ accepted
arxiv created 2006/01/27 · openalex publication_date 2006/04/25 · arxiv updated 2015/06/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have constructed a brand-new radiation hydrodynamics solver based upon Smoothed Particle Hydrodynamics, which works on a parallel computer system. The code is designed to investigate the formation and evolution of first-generation objects at z \gtrsim 10, where the radiative feedback from various sources plays important roles. The code can compute the fraction of chemical species e, H+, H, H-, H2, and H2+ by fully implicit time integration. It also can deal with multiple sources of ionizing radiation, as well as radiation at Lyman–Werner band. We compare the results for a few test calculations with the results of one-dimensional simulations, in which we find good agreements with each other. We also evaluate the speedup by parallelization, which is found to be almost ideal, as long as the number of sources is comparable to the number of processors.