Speaker: Tsz Yan Lam
Modified gravity models attracted recent interests as an attempt to solve
the puzzle of cosmic acceleration. One of the generic features of modified
gravity is the difference in mass probes originated from the propagation
of non-relativistic bodies (dynamical masses) versus those using massless
particles (gravitational lensing masses). In this talk I describe using
the stacked phase space distribution around massive clusters as a test of
gravity model. I will describe an analytic approach based on the halo
model to compute the distribution and I will compare measurements from
numerical simulations with GR and modified gravity model.