[M-GI30] Computational sciences on the universe, galaxies, stars, planets, and their environments

[MGI30-P03] Development of simulation code for planetary system formation (GPLUM) : Prospects by high-resolution N-body simulation

*Yota Ishigaki¹, Eiichiro Kokubo¹, Masaki Fujimoto², Junichiro Makino^3,4 (1.National Institutes of Natural Sciences, National Astronomical Observatory of Japan, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.Kobe University, 4.RIKEN Center for computational Science)

Keywords:Planet Formation, N-body Simulation

It is generally accepted that planetary systems are formed from protoplanetary disks surrounding a central star. In standard model, planets are formed by the accretion of planetesimals in the disk. The accretion process of planetesimals is mainly investigated using N-body simulations of planetesimal systems.

In this study, we have developed a new N-body simulation code, GPLUM, using the particle-particle particle-tree scheme (P³T scheme). We have implemented a more efficient algorithm than the conventional P³T code in GPLUM, which enables us to perform global, high-resolution N-body simulations. It is expected to enable new discussions such as parameter surveys using N-body simulations.

We present results of large-scale N-body simulations of the formation process of planetary systems by GPLUM using the supercomputer Fugaku. We discuss the resolution dependence of N-body simulations of the planet formation process by the high-resolution simulation. By comparing the results of N-body simulations with N=10⁴, 10⁵, and 10⁶, we discuss how the accretion process of planetesimals and protoplanets is affected by changes in the resolution of N-body simulations.

We also discuss the dependence of the results of N-body simulations with new collision model, which is modeled SPH simulation. We discuss the dependence of the results of N-body simulations on the conditions of collisin of planetesimal systems. We will also present the future prospects of planet formation simulations using high-resolution N-body simulations with GPLUM and Fugaku.