Taysun Kimm's group works on how stars form and drive strong outflows in galaxies using numerical simulations with adapative mesh refinement. We are also interested in various topics, including reionization of the Universe, escape of LyC and LyA photons from galaxies, RAM pressure stripping in clusters, formation of globular clusters, and the emergence of strong emission lines from galaxies.

Latest news

1 / 4

Origin of low LyC escape in LBGs: metallicity

The escape fraction of LyC photons from massive galaxies at z=3-4 (Lyman break galaxies) is often lower than that of galaxies during the epoch of reionization. We investigate the physical origin of the low escape fraction using radiation-hydrodynamic simulations. We find that high metallicity of the massive galaxies is primarily responsible for the low escape fraction in LBGs as young stars are enshrouded by dense gas clumps for a longer period of time. This provides a natural explanation for the negative dependence of escape fractions on dark matter halo mass, as is required to complete reionization by z~6 (Yoo, Kimm, Rosdahl 2020)