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- W2013347775 abstract "We propose a phenomenological model in which a non-minimal coupling between gravity and dark matter is present in order to address some of the apparent small scales issues of ΛCDM model. When described in a frame in which gravity dynamics is given by the standard Einstein-Hilbert action, the non-minimal coupling translates into an effective pressure for the dark matter component. We consider some phenomenological examples and describe both background and linear perturbations. We show that the presence of an effective pressure may lead these scenarios to differ from ΛCDM at the scales where the non-minimal coupling (and therefore the pressure) is active. In particular two effects are present: a pressure term for the dark matter component that is able to reduce the growth of structures at galactic scales, possibly reconciling simulations and observations; an effective interaction term between dark matter and baryons that could explain observed correlations between the two components of the cosmic fluid within Tully-Fisher analysis." @default.
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- W2013347775 date "2012-07-11" @default.
- W2013347775 modified "2023-10-05" @default.
- W2013347775 title "Non-minimally coupled dark matter: effective pressure and structure formation" @default.
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- W2013347775 doi "https://doi.org/10.1088/1475-7516/2012/07/027" @default.
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