Motion of Massive and Massless Test particles in Dyadosphere Geometry
  Motion of massive and massless test particle in equilibrium and non-equilibrium case is discussed in a dyadosphere geometry through Hamilton-Jacobi method. Geodesics of particles are discussed through Lagrangian method too. Scalar wave equation for massless particle is analyzed to show the absence of superradiance. 
B. Raychaudhuri, F. Rahaman, M. Kalam and A. Ghosh