Interacting scenarios with dynamical dark energy: observational
  constraints and alleviation of the $H_0$ tension
  We investigate interacting scenarios which belong to a wider class, since
they include a dynamical dark energy component whose equation of state follows
various one-parameter parametrizations. We confront them with the latest
observational data from Cosmic Microwave Background (CMB), Joint light-curve
(JLA) sample from Supernovae Type Ia, Baryon Acoustic Oscillations (BAO),
Hubble parameter measurements from Cosmic Chronometers (CC) and a gaussian
prior on the Hubble parameter $H_0$. In all examined scenarios we find a
non-zero interaction, nevertheless the non-interacting case is allowed within
2$\sigma$. Concerning the current value of the dark energy equation of state
for all combination of datasets it always lies in the phantom regime at more
than two/three standard deviations. Finally, for all interacting models,
independently of the combination of datasets considered, the estimated values
of the present Hubble parameter $H_0$ are greater compared to the
$\Lambda$CDM-based Planck's estimation and close to the local measurements,
thus alleviating the $H_0$ tension.
