Sangjun Cha

I am a Ph.D. candidate in Astronomy at Yonsei University studying galaxy clusters and dark matter through gravitational lensing. I develop MARS and MrMARTIAN, two lensing mass reconstruction methods. I apply them to strong and weak lensing observations from JWST, HST, and wide field imaging surveys. My work maps mass across a broad range of scales, from dense cluster cores to intracluster filaments. By combining lensing mass reconstruction with multiwavelength observations, I study how massive galaxy clusters assemble and evolve.

For talks, awards, and a complete academic record, please see my CV ↗.