A model of interacting dark fluids tested with supernovae and Baryon Acoustic Oscillations data

摘要

We compare supernovae and Baryon Acoustic Oscillations data to the predictions of a cosmological model of interacting dark matter and dark energy. This theoretical model can be derived from the effective field theory of Einstein-Cartan gravity with two scaling exponents delta(G) and delta(A), related to the interaction between dark matter and dark energy. We perform a chi(2) fit to the data to compare and contrast it with the standard ACDM model. We then explore the range of parameter of the model which gives a better chi(2) than the standard cosmological model. All those results lead to tight constraints on the scaling exponents of the model. Our conclusion is that this class of models, provides a decent alternative to the ACDM model. (C) 2019 The Authors. Published by Elsevier B.V.