We’ll be having a special talk this week:
Title: Angular Momentum Acquisition and Cold Flow Disks in Galaxies.
Speaker: Prof. Ari Maller
Time: Wednesday, April 17th 2013
Location: 6333
Abstract:
Angular momentum plays an important role determining the sizes of disk galaxies. However, galaxies contain only a small fraction of the baryons available to them. Thus the specific angular momentum of galaxies should not be the same as dark matter halos. Looking at hydrodynamical simulations I will show that specific angular momentum grows over cosmological time. In addition, cold flow gas has higher specific angular momentum than other gas or dark matter. The result of this is a cold flow disk that can extend as far as 50-100 kpc around galaxies and give rise to QSO absorption systems. The sizes of galaxy disks are thus strongly dependent on what gas they form from.
Astronomy Journal Club meets every Wednesday at noon in Stevenson Center 6333.
Check here for the full schedule.