Effects of anisotropy on gravitational infall in galaxy clusters using an exact general relativistic model

Understand

We study the effects and implications of anisotropies at the scale of galaxy clusters by building an exact general relativistic model of a cluster using the inhomogeneous and anisotropic Szekeres metric.

• The model is built from a modified Navarro-Frenk-White (NFW) density profile.
• We compare this to a corresponding spherically symmetric structure in the Lemaitre-Tolman (LT) model and quantify the impact of introducing varying levels of anisotropy.
• We examine two physical measures of gravitational infall -- the growth rate of density and the velocity of the source dust in the model.