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We are the Theoretical High Energy Astrophysics (THEA) group at Columbia University. We are located in the Columbia Departments of Physics and Astronomy in Pupin Hall on the Columbia Morningside campus. Our interests are broad, covering many topics in contemporary theoretical astrophysics (compact objects, gravitational wave sources, and other high-energy phenomena) and which call upon a wide range of physics topics (general relativity, radiation hydrodynamics, collisionless plasmas / stellar dynamics, and nuclear astrophysics). Click on the links below to learn about us and our research work.