Abstract

Contributed Talk - Splinter GalaxyClusters   (MW-1050)

Emission line galaxy model with a semi-analytic galaxy formation model, New Numerical Galaxy Catalog (ν2GC)

Kazuyuki Ogura
Kobe City College of Technology

The New Numerical Galaxy Catalog (nu2GC) is a semi-analytic model for the galaxy formation, which is successful to reproduce various statistical properties of galaxies at 0 < z < 6 by combining the state-of-the-art N-body simulation and phenomenological model. A remarkable aspect of the nu2GC is a large comoving volume up to ~25.7 Gpc^3 with sufficient mass resolution, which enables us to examine various properties of galaxies obtained by wide field surveys such as the Subaru Strategic Program survey with Hyper Suprime-Cam (HSC-SSP). As a pilot study, we construct a model of Hα emitters (HAEs) with nu2GC, resulting that it well reproduces the Hα luminosity function (LF) at z = 0.4 obtained by HSC-SSP observations (Ogura et al. 2020b). Based on the model, we have found that (1) HAEs are good tracer for the structure such as cosmic filaments, (2) the Hα LF within ~2 deg2 area show significant field variance up to ~1dex, and (3) >15 deg2 surveys are required to converge the luminosity function. In this presentation, we report the current status of our work on constructing the semi-analytic models of emission line galaxies with nu2GC.