[p1-5]

Numerical cosmology with an ensemble of simulations

T. Nishimichi, M. Takada, N. Yoshida, T. Oogi (Kavli IPMU), K. Osato, M. Oguri (The University of Tokyo), M. Shirasaki, T. Hamana (National Astronomical Observatory of Japan), R. Takahashi (Hirosaki University)

Imaging and spectroscopic galaxy survey programs offer unique opportunities to access mysterious dark components of the universe and fundamental law that governs the cosmic dynamics. We need, however, accurate theoretical templates and appropriate statistical methods to fully utilize such big data coming in the near future.
Here we introduce our simulation effort being carried out in close collaboration with the ongoing Hyper Suprime-Cam survey on Subaru telescope.
Employing more than 8 billion particles, we perform an ensemble of cosmological N-body simulations that efficiently cover multi-dimensional cosmological parameter space.
Emulators are then constructed to smoothly interpolate the simulation results over this space and predict basic statistical quantities to confront with observation.
We discuss the current status and future prospects of this project.