The web-like organisation of the universe Seminar

Megaparsec, galaxies and matter have aggregated into an intriguing wispy web-like structure consisting of dense compact clusters, elongated filaments and sheet-like walls, surrounding large near-empty void regions. Professor Weijgaert will review the large advances that have been made in mapping this cosmic web and in understanding its formation, evolution and dynamics. In some detail, Professor Weijgaert will discuss recent advances in modelling the evolving structure of the cosmic web in different cosmologies, in which geometric tools are used to solve an analytical approximation for the web-like density field. It allows a systematic assessment of the prominence and spectrum of dense halos, filaments, walls and voids. Subsequently, Rein will look into the phase space structure of the emerging web-like features, following recent promising developments that have opened up the path towards an accurate resolution of individual matter streams. Finally, Rein will use the multi-scale Nexus tool for looking into alignments of galaxy spins with their parent filaments.