My research focuses on understanding the formation and evolution of massive galaxies in the early universe, with a central aim of observationally tracing the full cycle through which star formation is triggered, regulated, and ultimately quenched across cosmic time. My work draws on data from JWST, the LEGGOS survey, and gravitational lensing fields.
To date, my research has centered on the evolutionary connection between dusty star-forming galaxies and quenching galaxies, with a particular focus on neutral gas outflows as a driver of star formation cessation. Going forward, I aim to build a more complete observational picture of galaxy evolution — tracing gas and dust cycling through the ISM and CGM, identifying the conditions that trigger extreme star formation, and disentangling the roles of AGN feedback, stellar feedback, and environment in regulating and quenching star formation in massive early galaxies.
Statistical Detection of Neutral Gas Outflows in z = 2–5 Quenching Galaxies with JWST
Read more →- Constructed a quiescent galaxy sample at 2.0 < z < 5.0 from the JWST NIRSpec catalog using Hα equivalent width measurements, separating quiescent, green-valley, and star-forming populations.
- Built matched spectroscopic–photometric datasets and performed SED fitting with Prospector to derive galaxy physical parameters and stellar continua.
- Subtracted stellar continua and performed spectral stacking of residual spectra to enhance Na I D absorption features.
- Measured equivalent widths and velocity offsets of the stacked absorption lines to probe neutral-gas outflows and their connection to quenching in massive high-redshift galaxies.
The Evolutionary Connection Between Dusty Star-Forming and Quiescent Galaxies at z = 2–6
Read more →- Reduced and stitched JWST/NIRSpec multi-grating spectra for 249 galaxies at z = 2–6.
- Performed Bayesian SED fitting with Prospector using nonparametric star formation histories.
- Classified galaxies via Hα equivalent width and identified dusty star-forming galaxies (DSFGs).
- Characterized dynamical state and star formation using σsmooth, SFR ratios, and peak SFR.
- Identified a small (~8%) rapidly quenching DSFG population linking starbursts to quiescent galaxies.
Intracluster Medium Gas Modeling in Galaxy Clusters
Read more →- Studied hot intracluster gas physics through joint modeling of X-ray and Sunyaev–Zel'dovich (SZ) observations following the CLUMP-3D framework.
- Implemented triaxial ellipsoidal projection models describing the three-dimensional gas density and pressure distributions of galaxy clusters and their projection along the line of sight.
- Developed interactive tools to visualize triaxial cluster projections.
- Performed Bayesian parameter inference using MCMC, comparing sampling between emcee and redemcee.
- Fitting a 13-parameter model and exploring posterior space