\begin{table}%T1
%\centering
\par
\caption{The best parameter values for theoretical
results and the comparison with some observational ones
from S2000.}
         \label{tab1}
         \begin{tabular} {cccccccc}
             \hline \hline
      \noalign{\smallskip}
{\parbox[t]{15mm}{%\centering
 PSR B}}& {\parbox[t]{10mm}{%\centering
\par
$\beta$}}&
 {\parbox[t]{10mm}{%\centering
\par
$D$\\(kpc)}}&
 {\parbox[t]{10mm}{%\centering
  $H$\\(kpc)}}&
 {\parbox[t]{15mm}{%\centering
   $V_{{\rm t}}$\\(km ${\rm s}^{-1}$)}}&
{\parbox[t]{15mm}{%\centering
   $V_{{\rm pm}}$\\(km ${\rm
s}^{-1}$)}}& {\parbox[t]{15mm}{%\centering
 $C_{-4,{\rm t}}$\\$({\rm
m}^{-20/3})$}}&
{\parbox[t]{15mm}{%\centering
  $C_{-4,{\rm DISS}}$\\$({\rm m}^{-20/3})$}}\\
       \noalign{\smallskip}
\hline
      \noalign{\smallskip}
\small \rm
\par
1642--03 & 11/3 & 0.5 & 0.25 & 110  & 110  & 1.8     & 20 \\
0329+54 & 11/3 & 1.4 & 0.7  & 83  & 140  & 0.8      & 4  \\
0736--40 & 11/3 & 2.1 & 1.05 & 770 & 770  & $10^{4.1}$ & $10^{4.1}$ \\
0740--28 & 11/3 & 1.9 & 0.95 & 240 & 240  & 100      & 100 \\
\hline
         \end{tabular}
   \end{table}