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Cosmological hydrodynamical simulations of modified gravity models

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Modified gravity models not only provide an alternative explanation of the accelerated expansion of the Universe, but also have scale-dependent effects on gravity and structure formation. Detailed predictions deep in the nonlinear regime are required for a faithful comparison of such models to observations. They can be obtained from cosmological simulations that account for the modifications of gravity. We will present a new code that is well suited for this purpose, as well as discuss first science applications. In particular, we have investigated degeneracies of modified gravity effects in chameleon type f{R}-models with uncertainties in the baryonic physics. Understanding them will be of critical importance for successfully detecting or reliably ruling out modified gravity models with upcoming surveys.

This talk is part of the Cosmology Lunch series.

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