Diffuse H I around galaxy groups
Ultra-deep FAST mapping reveals low-column-density gas far beyond stellar disks and tests how interactions and the cosmic web redistribute baryons.
Radio astronomy · Galaxy evolution
Tracing the cold gas that shapes galaxies.
I use H I and CO observations to follow how gas moves between galaxies and their surroundings—from clouds in the Milky Way halo to megaparsec-scale structures around galaxy groups.
Research
Gas across scales
My work connects sensitive radio observations with multiwavelength data to understand the baryon cycle: how galaxies acquire, transform, expel, and recycle their gas.
The Milky Way's gaseous ecosystem
I combine H I emission, ultraviolet absorption, and cloud kinematics to study the Magellanic Stream and cool gas entrained in the Galactic nuclear wind.
Interactions, star formation & AGN
H I, CO, and optical spectroscopy show how mergers reshape cold-gas reservoirs, trigger star formation, and feed or obscure active galactic nuclei.
Latest highlight · ApJL 2026
Megaparsec-scale neutral hydrogen flows around HCG 100
Deep FAST observations uncover one of the most extended and lowest-density neutral-gas systems detected in emission: a coherent envelope that links a compact group to its wider environment.
~1 Mpc
extent of the diffuse H I structure
8.6 × 1017
cm−2 integrated column density
40–50%
of the H I residing outside galaxies
Observational toolkit
From single dishes to interferometers
I have led or contributed to observing programs with FAST, VLA, GBT, IRAM 30-m, ALMA/ACA, JCMT, Parkes, and the Hale Telescope, working from proposal design through calibration, imaging, and scientific interpretation.