Explores the classification and statistics of AGN, black holes, unified AGN model, variability, megamasers, orbital motion measurement, and time-delay cosmography.
Explores gauge symmetry, amplitudes, black holes, and fluids, highlighting the interplay between redundancy, diffeomorphisms, and the double copy phenomenon.
Explores the Gravitational-Wave Transient Catalog 2 and the challenges in distinguishing compact bodies, emphasizing the need for accurate waveform models and the discovery potential in gravitational physics.