Abstract
We consider FLRW cosmological models with barotropic uid in the framework of scalartensor theories of gravity (STG) with arbitrary coupling function and potential, set in the Jordan frame. These models can exhibit (super-)accelerated expansion without a need to introduce any unusual matter component, and we give a necessary condition on the coupling function of the scalar eld which must be satised to allow (super-)acceleration to occur. To satisfy also the Solar System observations the models have to be close to the limit of general relativity (GR), which has been shown to function as an attractor in a large class of STG theories. Approximating the cosmological equations near this limit we nd the phase trajectories for the potential dominated case, and determine a condition when the ow of all trajectories is attracted to the GR point.
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