\begin{table}%T2
\caption{\label{table2}\label{tab2}Parameters used for the fit of the density pdf.} 
\small%\centering
\par
\begin{tabular}{c c c c  }         
\hline
\hline\noalign{\smallskip} 
         & $\bar{n}$ & ${\cal M}$  & ${\it b}$              \\
\hline 
\mbox{2-phase}     & 280   &  2.48  & 0.26     \\
Isothermal     & 6.5   &  3.49    & 0.33           \\
polytropic      & 3.6   &  2.95   & 0.4  \\
\hline 
\end{tabular}
\end{table}