4 p.m. - 5 p.m. Location: SLC 1.102
Dr. Lindsay King (UT Dallas)
Computer simulations of cosmological structure formation reveal that a 3D network of (mainly) dark matter filaments forms from the tiny density fluctuations present in the early Universe. Galaxy clusters eventually form at the intersections of the filaments in this cosmic web, with a mass function that is sensitive to the amount and nature of the dark matter and dark energy in the Universe.
I will focus on our work using computer simulations to study how aspects of cluster structure are manifest in their gravitational lensing signatures. These studies guide our work to develop tools to map the mass in and around clusters, integral to testing ideas on their formation and dark matter contents.
Galaxy clusters provide huge laboratories where the physics of dark and luminous matter can be studied. This part of the talk will describe our detailed investigation of a very rare system where two clusters have violently collided close to the plane of the sky. In particular, I will outline how we have mapped and weighed the matter in this system, most of which is dark.