Dark sector interactions and the curvature of the Universe in light of
  Planck's 2018 data
  We investigate the observational viability of a class of interacting dark
energy (iDE) models in the light of the latest Cosmic Microwave Background
(CMB), type Ia supernovae (SNe) and SH0ES Hubble parameter measurements. Our
analysis explores the assumption of a non-zero spatial curvature, the
correlation between the interaction parameter $\alpha$ and the current
expansion rate $H_0$, and updates the results reported in \cite{micol}.
Initially, assuming a spatially flat universe, the results show that the
best-fit of our joint analysis clearly favours a positive interaction, i.e., an
energy flux from dark matter to dark energy, with $\alpha \approx 0.2$, while
the non-interacting case, $\alpha = 0$, is ruled out by more than $3\sigma$
confidence level. On the other hand, considering a non-zero spatial curvature,
we find a slight preference for a negative value of the curvature parameter,
which seems to relax the correlation between the parameters $\alpha$ and $H_0$,
as well as between $H_0$ and the normalization of the matter power spectrum on
scales of 8$h^{-1}$ Mpc ($\sigma_8$). Finally, we discuss the influence of
considering the SH$0$ES prior on $H_0$ in the joint analyses, and find that
such a choice does not change considerably the standard cosmology predictions
but has a significant influence on the results of the iDE model.
