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- W2964155171 abstract "In this paper, we investigate a scenario in which late-time cosmic acceleration might arise due to coupling between dark matter and baryonic matter without resorting to dark energy or large-scale modification of gravity associated with extra degrees of freedom. The scenario can give rise to late-time acceleration in Jordan frame and no acceleration in Einstein frame — generic modification of gravity caused by disformal coupling. Using a simple parametrization of the coupling function, in maximally disformal case, we constrain the model parameters by using the age constraints due to globular cluster data. We also obtain observational constraints on the parameters using [Formula: see text] datasets. In this case, we distinguish between phantom and non-phantom acceleration and show that the model can give rise to phantom behavior in a narrow region of parameter space." @default.
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- W2964155171 date "2019-08-01" @default.
- W2964155171 modified "2023-09-25" @default.
- W2964155171 title "Cosmic acceleration sourced by modification of gravity without extra degrees of freedom" @default.
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- W2964155171 doi "https://doi.org/10.1142/s0219887819501287" @default.
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