To this end, Professor Hwang has been actively involved in numerous galaxy redshift surveys aimed at mapping the three-dimensional distribution of galaxies. The observed galaxy distribution is compared with the underlying matter distribution inferred from gravitational lensing, providing powerful constraints on the properties of dark matter.

In addition, he utilizes multi-wavelength observational data of galaxies and directly compares them with predictions from cosmological hydrodynamic simulations. Such comparisons are essential for testing the implementation of baryonic physics in these simulations. He is also engaged in direct comparisons of the large-scale distributions of galaxies and cosmic structures between observations and simulations, which serve as important tests of cosmological models of structure formation.

[Lab Homepage] https://exgalcos.github.io/

[Personal Homepage] https://hwanghs.github.io/