Institute for Advanced Study Informal Astrophysics Seminar

ABSTRACT: The simple paradigm of a galaxy cluster as isolated, smooth and spherical leads to many useful results, both about clusters themselves and when using clusters for cosmological parameters and galaxy evolution. A high resolution large volume dark matter simulation will be used to characterize some of the departures (the cosmic web, galaxy substructure) from these cluster idealities, their relations to each other, and some of the consequences for cluster galaxies, observed cluster masses, and beyond.