2011

Moving mesh cosmology: the hydrodynamics of galaxy formation

Sijacki, Debora, Vogelsberger, Mark, Keres, Dusan et al.

Understand

We present a detailed comparison between the well-known SPH code GADGET and the new moving-mesh code AREPO on a number of hydrodynamical test problems.

Through a variety of numerical experiments we establish a clear link between test problems and systematic numerical effects seen in cosmological simulations of galaxy formation.
Our tests demonstrate deficiencies of the SPH method in several sectors.
These accuracy problems not only manifest themselves in idealized hydrodynamical tests, but also propagate to more realistic simulation setups of galaxy formation, ultimately affecting gas properties in the full cosmological framework, as highlighted in papers by Vogelsberger et al.

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