Joaquin Sureda Hernandez
(Pontificia Universidad Catolica de Chile)
We perform an MCMC analysis with the most updated SN-Ia catalog using an alternative cosmological model named Delta Gravity. This model is based on a new Einstein-Hilbert action based on a new symmetry symbolized as . This theory predicts an accelerating Universe without the need to introduce a by hand in the equations.
The equations of motion that describe the expansion of the universe depend on two free parameters: and that are found by the MCMC simulation. Using these parameters we predicted cosmological parameters such as the Hubble Constant , the age of the universe and the deceleration parameter .
The most significant result is that Delta Gravity predicts that is km/(s Mpc). This value is in concordance with the last measurement of the local value, km/(s Mpc) (Riess 2018). This result is very important because could be an explanation to the tension today.
arXiv |
https://arxiv.org/pdf/1704.02888.pdf
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Marco San Martín
Joaquin Sureda Hernandez
(Pontificia Universidad Catolica de Chile)
Prof.
Jorge Alfaro
(PUC, Chile)
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