UCSC-SOE-11-16: Velocity Based Feature Extraction of Multistreaming Events in Cosmological Simulations

Uliana Popov, Eddy Chandra, Katrin Heitmann, Salman Habib, James Ahrens, and Alex Pang
06/22/2011 09:00 AM
Computer Science
Multistreaming events are of great interest to astrophysics because they are associated with the formation of large scale structures (LSS) such as halos, filaments and sheets. Until recently, these events were studied using scalar density field only. In this paper, we present a new approach that takes into account the velocity field information in finding these multistreaming events. Six different velocity based features are defined and studied. We find that these velocity based feature extractors show different aspects of multistreaming and provide us with a richer knowledge about the formation of LSS.