[M-GI35] Computational sciences on the universe, galaxies, stars, planets, and their environments

[MGI35-04] Semi-analytic modeling of galaxies and AGN in the Fugaku era

*Taira Oogi¹, Hikari Shirakata², Masahiro Nagashima³, Takahiro Nishimichi⁴, Toshihiro Kawaguchi⁵, Takashi Okamoto⁶, Tomoaki Ishiyama¹, Motohiro Enoki⁷ (1.Chiba University, 2.Tadano Ltd., 3.Bunkyo University, 4.Yukawa Institute for Theoretical Physics, Kyoto University, 5.Onomichi City University, 6.Hokkaido University, 7.Tokyo Keizai University)

Keywords:Galaxies, Active Galactic Nuclei, Large Scale Structure of the Universe, Cosmological N-body simulation

We present an updated version of our semi-analytic galaxy and AGN formation model, the New Numerical Galaxy Catalog, nu²GC.
The major update of the model is the merger trees of dark matter halos.
We construct the halo merger trees using an ultralarge cosmological N-body simulation, named Uchuu, which consists of 262 billion particles in a box of 2 Gpc/h.
The unprecedentedly large and high-resolution simulation allows us accurate determination of measurements of rare objects, such as autocorrelation functions of AGNs.
We show the basic statistical properties of galaxies and AGNs in our model, focusing on the spacial clustering of them.
The model prediction indicates that the time-scale of gas accretion on to the supermassive black holes plays a significant role in allowing massive halos to host relatively faint population of AGNs.
We find that the shape of the predicted AGN correlation function shows remarkable agreement with those from observations.