Sub-project C:
High-energy Astrophysical Phenomena in Black Holes and Supernovae



This project aims to elucidate the history of black hole formation and evolution, the mechanisms of high-energy phenomena around black holes affecting the star formation and galaxy evolutioin. The mechanism of gravitationally collapsing supernovae explosion, which is the key to the matter cycle in the universe, will be clarified by three-dimensional radiation hydrodynamics simulations based on first-principles calculations in which the neutrino radiation transport, physical processes related to atomic nuclei and neutrinos are more precisely treated.


Objectives and methods of this project

We will elucidate the structure and dynamics of black hole accretion disks, and clarify the production mechanism of relativistic jets. Furthermore, we will clarify the growth process of supermassive black holes and the effect of their growth on the evolution of surrounding stars and galaxies. We will elucidate the mechanism of supernova explosions using first-principles calculations of three-dimensional neutrino radiation hydrodynamics.



University of Tsukuba, Chiba University, Waseda University, National Astronomical Observatory of Japan, Numazu National College of Technology, and 8 partner institutions in Japan and overseas

Research Director: Ken Ohsuga (Professor, Center for Computational Sciences, University of Tsukuba)



Accretion disks and relativistic jets around black holes
(Takahashi et al. 2016)


Left: ELT observation of the massive black hole M87
Right: Simulated image by the general relativistic radiation transport code RAIKOU
(Kawashima et al. 2019, EHT collaboration 2019)


Schematic picture of a supernova explosion based on a 3D simulation of a supernova
(Takiwaki et al. 2014).

Program for Promoting Researches on the Supercomputer Fugaku

BasicScience for Emergence and Functionality in Quantum Matter Simulation for basic science: from fundamental laws of particles to creation of nuclei Human-scale whole brain simulation with connectome analysis and structure-function estimation Development of nuclear fusion plasma confinement physics Large Ensemble Atmospheric and Environmental Prediction for Disaster Prevention and Mitigation Large-scale numerical simulation of earthquake generation, wave propagation and soil amplification Quantum-Theory-Based Multiscale Simulations toward the Development of Next-Generation Energy-Saving Semiconductor Devices Computational and Data Science Study for ET Revolution by Development of Next-Generation Battery and Fuel Cell Digital Twins of Real World's Clean Energy Systems with Integrated Utilization of Super-simulation and AI