31 citations · 67 across the 10 of their papers we have counts for
11 papers
Time-reversible timestepping in many-body planetary systems
David M. Hernandez, Tenri Jinno, Junichiro Makino
Simulating chaotic planetary system evolution requires resolving small time-scales due to close encounters, scattering, collisions, and more. Simulations typically assign fixed tim…
Self-consistent -body simulation of Planetesimal-Driven Migration. II. The effect of PDM on planet formation from a planetesimal disk
Tenri Jinno, Takayuki R. Saitoh, Yoko Funato +1
According to the canonical planet formation theory, planets form "in-situ" within a planetesimal disk via runaway and oligarchic growth. This theory, however, cannot naturally acco…
The First Star-by-star -body/Hydrodynamics Simulation of Our Galaxy Coupling with a Surrogate Model
Keiya Hirashima, Michiko S. Fujii, Takayuki R. Saitoh +9
A major goal of computational astrophysics is to simulate the Milky Way Galaxy with sufficient resolution down to individual stars. However, the scaling fails due to some small-sca…
A new approach for predicting the stability of hierarchical triple systems -- I. Coplanar Cases
Ryutaro Iwakura, Yoko Funato, Junichiro Makino
Hierarchical triple systems play a crucial role in various astrophysical contexts, and therefore the understanding of their stability is important. Traditional empirical stability…
ASURA-FDPS-ML: Star-by-star Galaxy Simulations Accelerated by Surrogate Modeling for Supernova Feedback
Keiya Hirashima, Kana Moriwaki, Michiko S. Fujii +5
We introduce new high-resolution galaxy simulations accelerated by a surrogate model that reduces the computation cost by approximately 75 percent. Massive stars with a Zero Age Ma…
Self-consistent -body simulation of Planetesimal-Driven Migration I. The trajectories of single planets in the uniform background
Tenri Jinno, Takayuki R. Saitoh, Yoko Funato +1
Recent exoplanet observations have revealed a diversity of exoplanetary systems, which suggests the ubiquity of radial planetary migration. One powerful known mechanism of planetar…
Surrogate Modeling for Computationally Expensive Simulations of Supernovae in High-Resolution Galaxy Simulations
Keiya Hirashima, Kana Moriwaki, Michiko S. Fujii +4
Some stars are known to explode at the end of their lives, called supernovae (SNe). The substantial amount of matter and energy that SNe release provides significant feedback to st…
Global High-resolution -body Simulation of Planet Formation I. Planetesimal Driven Migration
Junko Kominami, Hiroshi Daisaka, Junichiro Makino +1
We investigated whether outward Planetesimal Driven Migration (PDM) takes place or not in simulations when the self gravity of planetesimals is included. We performed -body simu…
The origin of S-stars and a young stellar disk: distribution of debris stars of a sinking star cluster
Michiko Fujii, Masaki Iwasawa, Yoko Funato +1
Within the distance of 1 pc from the Galactic center (GC), more than 100 young massive stars have been found. The massive stars at 0.1-1 pc from the GC are located in one or two di…
Evolution of Star Clusters near the Galactic Center: Fully Self-consistent N-body Simulations
M. Fujii, M. Iwasawa, Y. Funato +1
We have performed fully self-consistent -body simulations of star clusters near the Galactic center (GC). Such simulations have not been performed because it is difficult to per…
Evolution of Clusters of Galaxies II: Dependence on Initial Cluster Model
T. Sensui, Y. Funato, J. Makino
We investigated the evolution of clusters of galaxies using self-consistent N-body simulations. We varied the initial model of galaxies and clusters, and studied the dependence of…