Overview
- A team led by RIKEN’s Keiya Hirashima unveiled at SC ’25 a hybrid model that follows more than 100 billion individual stars over 10,000 years.
- The surrogate, trained on high-resolution supernova calculations, forecasts roughly 100,000 years of gas evolution to avoid costly fine timesteps in the main simulation.
- Reported performance reached 2.78 hours per 1 million simulated years, projecting about 115 days for 1 billion years versus roughly 36 years using conventional methods.
- Outputs were checked against large-scale runs on RIKEN’s Fugaku and the University of Tokyo’s Miyabi systems to verify consistency.
- Coverage notes deployments across about 7 million CPU cores and points to potential use of the method in climate, weather, and ocean modeling.