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OATS-UNI/TS SEMINAR
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Speaker: Volker Springel (Heidelberg Inst. for Theoretical Studies)

Title: Cosmology on a moving mesh
Date: Wednesday, November 14th, 2012
Time: 11:30
Venue: Villa Bazzoni
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Abstract: I review some recent results of cosmological simulations of galaxy formation, with a focus on hydrodynamical simulations and ultra-large N-body simulations. In particular, I discuss how simulations using the new moving-mesh code AREPO compare with calculations based on the traditional SPH technique. Our results demonstrate that inaccuracies in hydrodynamic solvers can lead to comparatively large systematic differences even at the level of predictions for the global state of baryons in the universe. Results based on AREPO show systematically higher star formation rates at late times, lower mean temperatures averaged over the simulation volume, and larger galactic disks. There are also important improvements in the representation of subsonic turbulence in the gaseous atmospheres of halos. I will also discuss some results from the Millennium-XXL simulation, the largest high-resolution cosmological N-body simulation carried out to date.
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Contact: Stefano Borgani (OATS)