Explores the role of viscosity in redistributing angular momentum in astrophysical objects, focusing on accretion disks and energy conversion efficiency.
Explores the classification and statistics of AGN, black holes, unified AGN model, variability, megamasers, orbital motion measurement, and time-delay cosmography.
Covers gravitational lensing in astrophysics, including deflection angle, Einstein radius, lens solution, and its application to galaxies and the universe.
