Poster Presentation

Cosmological hydrodynamical simulation for the galaxy-IGM study in the PFS era

Author(s): Yuri Oku and Kentaro Nagamine (Osaka University)

Presenter: Yuri Oku (Osaka University)

Understanding the baryon cycle, the inflow from the intergalactic medium (IGM) into galaxies and the outflow driven by feedback processes like supernova explosions and AGN, is important for understanding galaxy formation.
The Prime focus spectrograph (PFS) is a multi-object spectrograph that will be installed at the prime focus of the Subaru Telescope for observations from 2024. The PFS observations will enable us to measure galaxy-HI/metal 3D cross-correlation at z=2.2-2.6 by the IGM tomography with a spatial resolution of 3 Mpc. Theoretical prediction of these galaxy-IGM correlations and comparison to observations will lead to a better understanding of the baryon cycle. In particular, differences in galaxy-HI, galaxy-metal, and HI-metal cross-correlations will be the key to understanding the physical process of driving the baryon cycle.
We are preparing to predict the galaxy-IGM cross-correlation using cosmological hydrodynamic simulations. We develop the GADGET4-Osaka code based on the cosmological smoothed hydrodynamics code GADGET-4 (Springel et al. 2021) and implement the supernova feedback model (Oku et al. 2022), dust model, and metal diffusion model (Romano et al. 2022).
We will present the basic statistics of galaxies, such as the galaxy stellar mass function and mass-metallicity relation, in cosmological simulations using GADGET4-Osaka and discuss the dependence on the feedback model.