Constraining a dark matter and dark energy interaction scenario with a
  dynamical equation of state
  In this work we have used the recent cosmic chronometers data along with the
latest estimation of the local Hubble parameter value, $H_0$ at 2.4\% precision
as well as the standard dark energy probes, such as the Supernovae Type Ia,
baryon acoustic oscillation distance measurements, and cosmic microwave
background measurements (PlanckTT $+$ lowP) to constrain a dark energy model
where the dark energy is allowed to interact with the dark matter. A general
equation of state of dark energy parametrized by a dimensionless parameter
`$\beta$' is utilized. From our analysis, we find that the interaction is
compatible with zero within the 1$\sigma$ confidence limit. We also show that
the same evolution history can be reproduced by a small pressure of the dark
matter.
