Ellipsoidal halo finders and implications for models of triaxial halo formation
Ellipsoidal halo finders and implications for models of triaxial halo formation
We describe an algorithm for identifying ellipsoidal haloes in numerical simulations, and quantify how the resulting estimates of halo mass and shape differ with respect to spherical halo finders. Haloes become more prolate when fit with ellipsoids, the difference being most pronounced for the more aspherical objects. Although the ellipsoidal …