To do that, Professor Ho Seong Hwang has been involved in various redshift surveys of galaxies to map galaxies. 

The obosered galaxy distribution is compared with the matter distribution from gravitational lensing, which is useful for constraining the characteristics of dark matter. He also uses the data from multi-wavelength obserations of galaxies and compares them with the predictions from cosmological hydrodynamic simulations, which is essential for the test of baryon physics implemented in such simulations. He is also working on the direct comparison of large-scale distributions of galaxies, large-scale structures in the universe between observations and simulations, which is an importtant test of cosmological models for structure formation.

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

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