http://arxiv.org/abs/1702.03185
We compare the supernovae 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 $\delta_{\Lambda}$, related to the interaction between dark matter and dark energy. We perform a $\chi^2$ fit to the supernovae Ia data to compare and contrast it with the standard $\Lambda$CDM 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 $\Lambda$CDM model.
D. Begue, C. Stahl and S. Xue
Mon, 13 Feb 17
39/57
Comments: 7 pages, 2 figures, submitted to MNRAS
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