RSAA Colloquia / Seminars / Feast-of-Facts: Thursday, 09 June 2016, 11:00-12:00; Duffield Lecture Theatre

Charlotte Welker

"Mergers and gas accretion onto galaxies: the imprint of the cosmic web"

In this talk I will present in details the major features that govern the geometry and dynamics of cosmic flows on Mpc scales, and further develop the consequences for mergers and gas inflows on galactic scales. In particular, I will explain how the dynamical and anisotropic nature of the cosmic web imprints the cold gas steams and their later accretion onto galaxies, and how it affects the satellite distribution, spin, morphology and scaling relations of galaxies over a wide range of redshifts. To perform this analysis, I will rely on both insights from lagrangian theory and recent results drawn from zoom simulations of clusters and the analysis of the 100Mpc.h-1 box « full-physics» hydrodynamical cosmological simulation Horizon-AGN.