The early growth of high-redshift quasars and their host galaxies raises critical questions about their cosmic evolution. We exploit the angular resolution and sensitivity of NIRCam to investigate the host galaxies of 31 quasars at $4\lesssim z\lesssim7$ drawn from multiple JWST surveys. Using a new multi-band forward-modeling code (\textsc{GalfitS}) that incorporates physically motivated...
Accurate supermassive black hole (SMBH) mass measurements are essential for understanding their formation and coevolution with host galaxies. Recent advances with the GRAVITY instrument on the Very Large Telescope Interferometer have revolutionized our ability to study active galactic nuclei (AGNs) and luminous quasars at unprecedented angular resolution. In this talk, I will present GRAVITY...
