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Stability of cosmic structures in scalar-tensor theories of gravity

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arxiv 1710.02485 v2 pith:RSNXLHCS submitted 2017-10-06 astro-ph.CO

Grigoris Panotopoulos , Angel Rincon This is my paper · ORCID
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keywords cosmicdatagravitymodelparameterssolutionstabilitystructures
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In the present work we study a concrete model of Scalar--Tensor theory of gravity characterized by two free parameters, and compare its predictions against observational data and constraints coming from supernovae, solar system tests as well as the stability of cosmic structures. First an exact analytical solution at the background level is obtained. Then using that solution the expression for the turnaround radius is computed. Finally we show graphically how current data and limits put bounds on the parameters of the model at hand.

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