ZURUECK HOCH VOR INHALT SUCHEN

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Proposing Institution

Institut für Astrophysik Göttingen
Project Manager

Dr. Wolfram Schmidt
Zülpicher Str. 77
50937 Köln
Abstract
The aim of our proposed project is to run numerical simulations of whole disk galaxies with the largest resolution that is computationally feasible (smallest resolved length scales around 10 pc or less) and to analyze the scale-dependent production of turbulence by different drivers, ranging form large-scale gravitational and shear instabilities down to cooling instabilities and the interaction of shocks on length scales comparable to the size of star-forming clouds. We want to apply adaptive mesh refinement with refinement criteria that are capable of detecting compressions resulting from gravitational collapse, cooling and supersonic turbulence. In combination with AMR, we will apply a subgrid scale model to compute the turbulent pressure of numerically unresolved velocity fluctuations. Based on this subgrid scale model, the effect of the turbulent pressure on the star formation rate can be calculated, and stellar feedback processes will be included as well. In the first project phase, a disk in a static dark-matter background will be used as initial condition. In the second project phase, we intend to extract data from a region around a galactic halo in a cosmological simulation to zoom in and to compute the evolution in detail.

Impressum, Conny Wendler