Résumé / Abstract Journal-club_Univers

Journal-club Univers / Journal-club Universe

« Winners and losers: the angular momentum of DM haloes within the large scale structure »

Pablo Lopez
Grupo Investigaciones Astronomía Teórica Experimental (IATE), Obs. Astron. (Córdoba, Argentine)

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 their dynamical evolution and the surrounding matter distribution within the cosmic web.
mardi 9 juillet 2019 - 11:15
Salle 281, Institut d'Astrophysique
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