Baryonic Tully–Fisher Test of Grumiller’s Modified Gravity Model

Model selection for modified gravity.

In this article, we review model selection predictions for modified gravity scenarios as an explanation for the observed acceleration of the expansion history of the Universe. We present analytical procedures for calculating expected Bayesian evidence values in two cases: (i) that modified gravity is a simple parametrized extension of general relativity (GR; two nested models), such that a Baye...

A New Model of Nonlocal Modified Gravity

In spite of the great successes of General Relativity (GR) it has not got the status of a complete theory of gravity. To modify GR there are motivations coming from its quantum aspects, string theory, astrophysics and cosmology. For example, cosmological solutions of GR contain Big Bang singularity, and Dark Energy as a cause for accelerated expansion of the Universe. This initial cosmological ...

Cluster density profiles as a test of modified gravity

Lucas Lombriser, Fabian Schmidt, Tobias Baldauf, Rachel Mandelbaum, Uroš Seljak, and Robert E. Smith Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK Institute for Theoretical Physics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland Theoretical Astrophysics, California Institute of Technology M/C 350-17, Pasadena, California 91...

Modified Gravity Theories: Distinguishing from ΛCDM Model

The method and probability of distinguishing between the Λ cold dark matter (ΛCDM) model and modified gravity are studied from future observations for the growth rate of cosmic structure (Euclid redshift survey). We compare the mock observational data to the theoretical cosmic growth rate by modified gravity models, including the extended Dvali–Gabadadze–Porrati (DGP) model, kinetic gravity bra...

Modified gravity and cosmology