Are Cold Dynamical Dark Energy Models Distinguishable in the Light of
  the Data?
  In this paper we obtain observational constraints on three dynamical cold
dark energy models ,include PL , CPL and FSL, with most recent cosmological
data and investigate their implication for structure formation, dark energy
clustering and abundance of CMB local peaks. From the joint analysis of the CMB
temperature power spectrum from observation of the Planck, SNIa light-curve,
baryon acoustic oscillation, $f\sigma_8$ for large scale structure observations
and the Hubble parameter, the PL model has the highest growth of matter
density, $ \Delta_{m} $, and matter power spectrum, $ P(k) $, compared to
$\Lambda$CDM and other models. For the CPL on the other hand, the structure
formation is considerably suppressed while the FSL has behavior similar to
standard model of cosmology. Studying the clustering of dark energy, $
\Delta_{DE}$, yields positive but small value with maximum of $
\Delta_{DE}\simeq10^{-3} $ at early time due to matter behaviour of the PL,
while for the CPL and FSL cross $ \Delta_{DE}=0 $ several time which
demonstrate void of dark energy with $ \Delta_{DE}\simeq-10^{-11} $ in certain
periods of the history of dark energy evolution. Among these three models, the
PL model demonstrate that is more compatible with $ f\sigma_{8} $ data. We also
investigated a certain geometrical measure, namely the abundance of local
maxima as a function of threshold for three DDE models and find that the method
is potentially capable to discriminate between the models, especially far from
mean threshold. The contribution of PL and CPL for late ISW are significant
compared to cosmological constant and FSL model. The tension in the Hubble
parameters is almost alleviated in the PL model.
