Study of non-canonical scalar field model using various parametrizations
  of dark energy equation of state
  In this present work, we try to build up a cosmological model using a
non-canonical scalar field within the framework of a spatially flat FRW
space-time. In this context, we have considered four different parametrizations
of the equation of state parameter of the non-canonical scalar field. Under
this scenario, analytical solutions for various cosmological parameters have
been found out. It has been found that the deceleration parameter shows a
smooth transition from a positive value to some negative value which indicates
that the universe was undergoing an early deceleration followed by late time
acceleration which is essential for the structure formation of the universe.
With these four parametrizations, the future evolution of the models are also
discussed. It has been found that one of the models (Generalized Chaplygin gas
model, GCG) mimics the concordance $\Lambda$CDM in the near future, whereas two
other models (CPL and JBP) diverge due to future singularity. Finally, we have
studied these theoretical models with the latest datasets from SN Ia $+$ $H(z)$
$+$ BAO/CMB.
