Research Interests: The theory of supernova explosions, with a particular focus on the mechanism of explosion and multi-dimensional radiation/hydrodynamic simulations of collapse dynamics; The theory of the atmospheres, spectra, structure, and evolution of extrasolar giant planets (and of exoplanets in general), and its comparison with data; The theory of brown dwarfs in all their particulars; High-energy astrophysics, with an emphasis on gravitational wave physics, neutrino astrophysics, and gamma- ray line astronomy; Tools and methodologies developed in support of these studies include numerical hydrodynamics, radiative transfer, nuclear and particle physics, chemistry, molecular spectroscopy, equations of state of exotic matter, and magnetohydrodynamics