Astrophysics of Compact Objects (White Dwarfs, Neutron Stars, and Black Holes) Populations of X-ray Binaries, Binary Pulsars, Double Compact Objects, Gamma-Ray Bursts, Supernovae and Supernova Progenitors Formation and Evolution of Binary Systems with Compact Objects in the Milky Way and other galaxies, in Fields and Dense Stellar Environments Time-Domain, Gravitational-Wave, and Transient Astrophysics Advanced Data Analysis and Inference Methods