[M-GI32] [JJ] Development of computational sciences on planetary formation, evolution and surface environment

[MGI32-03] GPU-accelerated High-resolution N-body Simulations for Planet Formation Toward 100 Million Particles

*Yasunori Hori^1,2, Shoichi Oshino³, Masaki Iwasawa⁴, Michiko Fujii⁵ (1.Astrobiology Center, National Institutes of Natural Sciences, 2.Exoplanet Detection Project, National Astronomical Observatory of Japan, 3.Center for Computational Astronomy, National Astronomical Observatory of Japan, 4.Advanced Institute for Computational Science, RIKEN, 5.Department of Astronomy, University of Tokyo)

Keywords:Planet formation, N-body simulation, GPU

We developed a fully-parallelized hybrid N-body code for planet formation (PENTACLE: Iwasawa et al., submitted), implementing the P³T method (Oshino et al., 2011) and a multi-purpose platform for a parallelized particle-particle simulation (FDPS: Iwasawa et al., 2016) into it. PENTACLE enables us to handle up to ten million particles for N-body simulations in a collisional system, using a present-day supercomputer. Toward a high-resolution N-body simulation with 100 million particles and beyond, we are now developing a parallelized hybrid N-body code optimized for a NVIDIA-based GPU cluster. In this talk, we show the performance and capability of PENTACLE and results of terrestrial planet formation in a narrow ring containing one (and ten) million planetesimals. Then, we introduce the current status of our GPU-accelerated N-body code (PENTAGLE) and our future plans, for example, a global simulation of the delivery of water to the Earth in the protosolar nebula.