Mexican Hat Gravitational Lenses (2007)
Paul Haines Waseda, Paul Haines, Deon Solomons
The mexican hat function is used to model a compensated (in density) gravitational lens. First we discuss the need for compensation. Then we integrate photon orbits to construct wavefronts. One...
Peculiar Velocities of Nonlinear Structure: Voids in McVittie Spacetime (1999)
As a study of peculiar velocities of nonlinear structure, we analyze the model of a relativistic thin-shell void in the expanding universe. (1) Adopting McVittie (MV) spacetime as a background...