Welcome to the personal web site of Kathryn Z. Hadley PhD, Kathryn Z. (Zadrozny) Hadley is a professor of physics, enthusiastic about teaching many aspects of physics, and dedicated to pursuing her research in astrophysics theory. One current project involves the inclusion of a resolved star as the central object in the system, as opposed to a point-mass star. Spatial resolution of the star allows modes of oscillation to arise in the star. Gravitational coupling between the star and disk allows the stellar modes to influence the evolution of the modes i.