these, we compare our model predictions with the experimental data [@Arsene:2005mr]. We find that our model explains the data very well over all the centralities. For the sake of convenience, we take the strangeness saturation factor ($\gamma_{s}$) equals 1 over all the centrality at this energy. In ref. [@Cleymans:2004pp], the detailed analysis of variations of particle ratios with centrality is done using the variation of $\gamma_{s}$ with $N_{part}$.

![The variations of particle ratios for Au-Au collisions with respect to number of participants at $\sqrt{s_{NN}}$ = 200 GeV. Symbols show the experimental data [@Arsene:2005mr] and lines are our model calculations.](all_200.pdf){height="25em"}

![Transverse energy per charged particle vs number of participants for Au-Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Symbols are the experimental data [@Adams:2004cb]. Solid line is the result obtained in our model with flow while dotted line is the result of our model calculations.](et_nch_200.pdf){height="25em"}

In figure 3, we show the variations of $E_{T}/N_{ch}$ with $N_{part}$ for Au-Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. We take the same value of T and $\mu_{B}$ as used in the calculation of the hadron ratios with respect to $N_{part}$ at this energy while studying the $N_{part}$ dependence of $E_{T}/N_{ch}$. We also compare our results with 