Professor Kalogera is interested in the physics of compact astrophysical objects: white dwarfs, neutron stars, and black holes. In binary systems, where two stars orbit each other, the interactions of compact objects are especially interesting. They can include a wide variety of violent phenomena such as powerful X-ray emission, supernova explosions, black hole formation, and mergers. Prof. Kalogera's research is focused mainly on how such systems are born, how they evolve, and how they end their lives. She is also interested in how the properties of such systems are affected by their galactic environments.