On the connection between assembly bias and the angular momentum growth

LÓPEZ, PABLO

Santiago

Workshop; Mini Workshop on Assembly Bias; 2019

Pontificia Universidad Católica

The tidal torque theory (TTT) relates the origin and evolution of angular momentum with the environment in which dark matter (DM) haloes form. However, though is the most accepted model in the current paradigm, its validity range is limited to the early times of structure formation. In this talk we present the results of classifying haloes according to their systematic deviations from the TTT through a simple scheme derived from the model formalism. The resulting samples show different internal alignments, spin parameter distributions and assembly histories. Moreover, the classification strongly correlates with the anisotropic clustering around haloes. Hence, our results suggest a specific connection between the halo assembly bias, the differences in the haloes dynamical evolution and the surrounding matter distribution within the cosmic web.