Fredagskollokvium: Galaxy formation in a dark matter dominated Universe
Oscar Agertz, Researcher, Lund Observatory
In this talk I will discuss our current understanding of galaxy formation and the role that numerical simulations plays. I will discuss how our standard cosmological model provides an attractive explanation for observed properties of the Universe, such as the large scale distribution of galaxies. I will demonstrate how individual galaxies, such as the Milky Way, assemble over almost 14 billion years of cosmic evolution, with an emphasis of the need to model stellar feedback processes and interstellar medium physics. Finally I will discuss current problems in galaxy formation theory, specifically those related to the structure and abundance of dwarf galaxies, and how the interaction between supernovae explosions, baryons and dark matter may be able to reconcile theory with observations.