Research Interests

(ADS)

• Supermassive black holes (SMBHs) at the center of active galactic nuclei (AGN) – Black hole accretion flow and jet physics
  • AGN feedback on its environments and host galaxy
  • The intermediate-mass black holes
• Radio astronomy with the very long baseline interferometry (VLBI) – High-resolution imaging of the SMBHs and the AGN jets
  • VLBI astrometry & polarimetry
• Software development for the VLBI data calibration, imaging, and analysis

Highlights

• Intrinsic structure of the supermassive black hole at the center of our Galaxy, Sagittarius A* (Cho et al. 2022, ApJ)

• Bent jet structure of OJ287 and its polarization with Space VLBI (Cho et al. 2024, A&A)

• Imaging simulation for M87* with EHT+EKVN (Cho et al. 2025, JKAS)

• Origin of the ring ellipticity in the black hole images of M87* (Dahale, Cho et al. 2025, A&A)

• Spatially resolved polarization swings in the supermassive binary black hole candidate OJ287 (Gomez, Cho et al. 2026, A&A)