A model independent parametrization of the late time cosmic
  acceleration: constraints on the parameters from recent observations
  In this work, we have considered a model independent approach to study the
nature of the late time cosmic acceleration. We have used the Pade
approximation to parametrize the comoving distance. Consequently, from this
comoving distance, we derive a parameterization for the Hubble parameter. Our
parametrization is completely analytic and valid for late-time and matter
dominated eras only. This parametrization possesses sub-percentage accuracy
compared to any arbitrary cosmological model or parametrization up to matter
dominated era. Using this parametrization, we put constraints on the parameters
from recent low redshift cosmological observations including Planck 2018
distance priors. Our results show that the $\Lambda$CDM model is 1$\sigma$ to
2$\sigma$ away for lower redshifts. We find that the phantom crossing is
allowed by all the combinations of dataset considered. We also find that the
dynamical dark energy models are preferable at lower redshifts. Our study also
shows that, at lower redshifts ($z<0.5$), phantom models are allowed at almost
1$\sigma$ confidence level.
