Research.

My primary research interest is using the 21-cm line of hydrogen (HI) to study the formation and evolution of galaxies, interstellar medium (ISM) properties, and the baryonic cycle. As the raw material for star formation, HI gas is not only detected in the inner disk of galaxies but also in the outermost regions. The HI disk is typically extended in most late- and early-type galaxies, which can trace star formation in the outer disk of galaxies and reveal the gravitational interactions with neighboring galaxies. In large-scale structures, HI also can be found in filament, group, and cluster. Furthermore, the HI kinematics of galaxies can be used to derive rotation curves with high spectral resolution, which in turn can help measure dark matter mass and test the dark matter models. With the next generation of large-scale and high sensitivity HI surveys based on several new radio telescopes, such as ASKAP, MeerKAT, FAST, and upcoming SKA, we are entering a new era for studying the fundamental science questions about galaxy formation, galaxy evolution, and cosmology.