Abstract:
In this letter, we study the cosmological dynamics of steeper potential than exponential. Our analysis shows
that a simple extension of an exponential potential allows to
capture late-time cosmic acceleration and retain the tracker
behavior. We also perform statefinder and Om diagnostics
to distinguish dark energy models among themselves and
with CDM. In addition, to put the observational constraints
on the model parameters, we modify the publicly available
CosmoMC code and use an integrated data base of baryon
acoustic oscillation, latest Type Ia supernova from Joint Light
Curves sample and the local Hubble constant value measured
by the Hubble Space Telescope.
