Observational Tests of Gauss-Bonnet Like Dark Energy Model
  The consistency of some dynamical dark energy models based on Gauss-Bonnet
invariant, ${\cal G}$, is studied compared with cosmological observational
tests. The investigated models are modified form of Gauss Bonnet dark energy,
MGB-DE and two other versions which are interacting MGB and $n_0$MGB. The
energy density of proposed models are combinations of powers of the Hubble
rate, H, and its time derivative. To inquire the performance of MGB dark energy
models, we have used data analyzing methods and numerical solutions, in both
background and perturbed levels, based on recent observational data from SNIa,
Baryon Acoustic Oscillations (BAO), Hubble parameter, CMB data, and structure
formation data surveys. Employing joint data sets and comparing the results to
those of LCDM, show that all versions of MGB-DE predicts the expansion history
and evolution of structures appropriately as well as $\Lambda$CDM. If we use
pure late universe data set, we see that all models of MGB-DE are successful in
recent epoch, and there is not any significant evidence against or in favor of
$\Lambda$CDM, whereas for early universe, statistical results indicate a
significantly better agreement for $\Lambda$CDM as compared to all versions of
MGB-DE models.
