3 years ago

An accelerating Universe without $\Lambda$ in concordance with the last $H_0$ measured value.

Jorge Alfaro, Marco San Martin, Joaquin Sureda

We present a Markov Chain Monte Carlo (MCMC) analysis with the most updated catalog of SN-Ia using an alternative cosmological model named Delta Gravity. This model is based on a new Einstein-Hilbert action obtained by the extension of a new symmetry symbolized as $\tilde{\delta}$. This theory predicts an accelerating Universe without the need to introduce a cosmological constant $\Lambda$ by hand in the equations. We obtained a very good fit to the SN-Ia Data, and with this, we found the two free parameters of the theory called $C$ and $L_2$. With these values, we can predict different cosmological parameters. One of them is the Hubble constant. The last $H_0$ local value measurement is in tension with the CMB Data from Planck.\cite{Riess2016}. Therefore is very interesting to analyze it in this theory. DG predicts $H_0$ to be $74.47\pm 1.63$ km/(s Mpc). This value is in concordance with the last measurement of the $H_0$ local value, $73.83\pm 1.48$ km/(s Mpc) \cite{Riess2018}.

Publisher URL: http://arxiv.org/abs/1811.05828

DOI: arXiv:1811.05828v1

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