APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Neal Dalal (U of Illinois)
Title: Structure formation with fast particles
Date (JST): Thu, Dec 04, 2014, 15:30 - 16:30
Place: Seminar Room A
Abstract: I'll describe 3 topics that are (somewhat) related. First, I'll discuss a novel method to simulate nonlinear structure formation in cosmologies with hot particles, such as massive neutrinos and warm/hot dark matter, that suppresses the numerical artifacts that have plagued previous simulations. Secondly, I'll present preliminary results of our simulations for cosmologies with massive neutrinos, and I will describe a possibly new signature of neutrino mass in large-scale structure. Finally, time permitting, I'll introduce a project using ALMA to probe halo substructure in strong gravitational lensing systems, which should dramatically improve constraints on DM variants like warm dark matter.