Professor Frank van den Bosch Department of Astronomy Yale University

New Insights regarding the Stellar Mass Assembly of Galaxies across Cosmic Time

How do galaxies assemble their stellar mass across cosmic time? Despite a well formulated, 35 year-old framework of hierarchical, galaxy formation in a Universe dominated by dark matter and dark energy, this basic question, which is central to the study of galaxy evolution, still begs for a satisfactory answer. In this talk I present a novel method to study galaxy formation, which is both simple and transparent. Unlike semi-analytical models and hydrodynamical simulations, this model can easily fit all existing data, providing valuable insights into the physics that regulate the assembly of galaxies across cosmic how. In particular, I present evidence for a new, characteristic scale in galaxy formation, which regulates the formation of dwarf galaxies, and which may be crucial for understanding reionization.