Dark Energy with Phantom Crossing and the tension
arXiv:2005.12587 · doi:10.3390/e23040404
Abstract
We investigate the possibility of phantom crossing in the dark energy sector and solution for the Hubble tension between early and late universe observations. We use robust combinations of different cosmological observations, namely the CMB, local measurement of Hubble constant (), BAO and SnIa for this purpose. For a combination of CMB+BAO data which is related to early Universe physics, phantom crossing in the dark energy sector is confirmed at \% confidence level and we obtain the constraint km/s/Mpc at 68\% confidence level which is in perfect agreement with the local measurement by Riess et al. We show that constraints from different combination of data are consistent with each other and all of them are consistent with phantom crossing in the dark energy sector. For the combination of all data considered, we obtain the constraint km/s/Mpc at 68\% confidence level and the phantom crossing happening at the scale factor at 68\% confidence level.
10 pages, 3 figures, Accepted
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