Poster Presentation

Finding the relation between O32 and Lyman continuum escape fraction using RAMSES-RTZ

Author(s): Hyunwoo Song (Yonsei University) Taysun Kimm (Yonsei University) Daniel Han (Yonsei University) Maxime Rey (Yonsei University, Centre de recherche Astrophysique de Lyon)

Presenter: Hyunwoo Song (YONSEI UNIVERSIEY)

Lyman Continuum radiation (LyC) ionizes hydrogen in the early Universe, suppressing star formation and thus directly affecting the evolution of galaxies. However, finding galaxies that emit LyC is difficult because it is easily absorbed by neutral hydrogen gas. As an alternative, indirect methods have been proposed to study the LyC escape using the ratio of [OIII] to [OII] luminosities (O32 ratio), but their physical connection is not clearly understood. In this study, we perform numerical simulations using RAMSES-RTZ to understand the relationship between the O32 ratio and the LyC escape fraction. Using numerical simulations with different maximum resolutions, we show that resolving the OII ionization front is important for predicting the OII luminosity in homogeneous media. We also perform turbulent GMC simulations and discuss the correlation between the LyC escape fraction and the O32 ratio.