Poster Presentation

Bright galaxies and giant HII bubbles in protoclusters at the epoch of reionization

Author(s): Hidenobu Yajima (University of Tsukuba), Makito Abe (Kosen, Kure College), Kenta Soga (University of Tsukuba), Hajime Fukushima (University of Tsukuba)

Presenter: Hidenobu Yajima (University of Tsukuba)

We lead a simulation project called FOREVER22, focusing on the formation of massive bright galaxies in the large-scale structure and their radiative properties (Yajima et al. 2022, MNRAS, 509, 4037). We find that galaxies with star formation rates exceeding 100 solar masses per year form in protoclusters even at z > 8, and their brightnesses and stellar masses are similar to those of candidates observed by JWST (Yajima et al. 2023, MNRAS, 525, 4832). In addition, we calculate the ionization structures around protoclusters and find that giant HII bubbles with the size of ~ 1 cMpc can be associated with protoclusters at z~10. In my presentation, I will show the recent simulation results on galaxy formation, reionization, and the observabilities of member galaxies in protoclusters.