Dark matter: from the early Universe to the Milky Way
Speaker: Anne Green
Date: 11/07/2006, 2:00 PM CST
Length: 1 Hours, 5 Minutes, 46 Seconds
Abstract: The initial conditions for structure formation, and hence the dark matter distribution on sub-galactic scales, depend on the microphysics of the dark matter in the early Universe. I will focus on WIMPs and explain how collisional damping and free-streaming erase perturbations on comoving scales k> ~1/pc. Consequently the first structures to form in the Universe are mini-halos with mass of order the Earth. I will then describe the status of calculations of the subsequent dynamical evolution of these mini-halos. Finally, if time permits, I'll briefly overview the microphysics of axions.
If you have the time and an interest in dark matter, you should invest the hour to look at it! During her talk, I noticed that in my earlier post I forgot to point out the important thing to notice in the figure below: the absence of even smaller structures in the magnification.
(picture from astro-ph/0501589)
TAGS: SCIENCE, PHYSICS, ASTROPHYSICS, COSMOLOGY, DARK MATTER