The H0​ tension between low- and high- redshift measurements is definitely
a serious issue faced by current cosmologists since it ranges from 4σ to
6σ. To relieve this tension, in this paper we propose a new interacting
dark energy model with time varying coupling parameter by parameterizing the
densities of dark matter and dark energy, this parametric approach for
interacting dark sectors are inspired by our previous work concerning the
coupled generalized three-form dark energy model in which dark matter and dark
energy behave like two uncoupled dark sectors with effective equation of state
when the three-form ∣κX∣≫1, for this reason, we reconstruct coupled
generalized three-form dark energy from such parametric model under the
condition ∣κX0​∣≫1. In the end, we place constraints on the
parametric model with the coupled generalized three-form dark energy model
proposed in our previous work in light of the Planck 2018 cosmic microwave
background (CMB) distance priors, baryon acoustic oscillations (BAO) data from
the BOSS Data Release (DR) 12, Pantheon compilation of Type Ia supernovae (SN
Ia) data and the latest local determinations of the Hubble constant from Riess
et al., i.e. the so called R20. The fitting results show that, comparing to
R20, the parametric model relieves the Hubble tension to 0.05σ with
χmin2​=6.70 and the coupled generalized three-form dark energy
model relieves the Hubble tension to 0.70σ with χmin2​=9.02.
However, it is worth noting that the tiny Hubble tension between R20 and the
parametric model is mostly due to the fact that the introduction of the
parameter k greatly increase the uncertainty of the Hubble constant obtained
without using a H0​ prior.Comment: 11 pages, 4 figures, has been submitted to PR