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Spatial variations of the fine-structure constant in symmetron models
Marvin F. Silva, Hans A. Winther, David F. Mota +1
We investigate the variation of the fine-structure constant, α, in symmetron models using N-body simulations in which the full spatial distribution of α at different redshifts has…
The Layzer-Irvine Equation for Scalar-Tensor Theories: A Test of Modified Gravity N-body Simulations
Hans A. Winther
The Layzer-Irvine equation describes energy conservation for a pressure less fluid interacting though quasi-Newtonian gravity in an expanding Universe. We here derive a Layzer-Irvi…
ISIS: a new N-body cosmological code with scalar fields based on RAMSES. Code presentation and application to the shapes of clusters
Claudio Llinares, David F. Mota, Hans A. Winther
Several extensions of the standard cosmological model include scalar fields as new degrees of freedom in the underlying gravitational theory. A particular class of these scalar fie…
Systematic simulations of modified gravity: chameleon models
Philippe Brax, Anne-C. Davis, Baojiu Li +2
In this work we systematically study the linear and nonlinear structure formation in chameleon theories of modified gravity, using a generic parameterisation which describes a larg…