\begin{table}%t2
%   
\par
      \caption {\label{tab:v}{Rotational velocity}, with values at the half-light
      radius for an exponential disk and a Mestel disk, using the same
      cases as in Table~\ref{tab:ml}.}
              $$ 
         \begin{array}{p{0.45\linewidth}ccc}
            \hline\hline
            \noalign{\smallskip}
            Case      &  \upsilon_{\rm c}/{\rm km~s}^{-1}  &  \upsilon_{\rm c}/{\rm km~s}^{-1}  &  \upsilon_{\rm c}/{\rm km~s}^{-1}~^{{a}}  \\
                      & { (\sigma_{R}=45~{\rm
                          km~s^{-1}})} & { (\sigma_{\rm
                          R}=71~{\rm km~s^{-1}})} & { (\sigma_{\rm R,Alt}=10~{\rm km~s^{-1}})} \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
            Exp., $Q=1$     &125 &188 & 38 \\ %39
            Exp., $Q=1.5$   &102 &153 & 31 \\ %32
            Exp., $Q=2$     & 89 &133 & 27 \\ %28
            Exp., $\lambda=\lambda_{\rm max}$     & 64 & 94 & 36 \\ %36
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
            Measured + asym.\ drift & 59 & 87 & 28 \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
            Mestel, $Q=1$   &113 &169 & 35 \\ %37
            Mestel, $Q=1.5$ & 92 &138 & 29 \\ %30
            Mestel, $Q=2$   & 80 &119 & 25 \\ %26
            Mestel, $\lambda=\lambda_{\rm max}$   & 58 & 84 & 34  \\ %34
            \noalign{\smallskip}
            \hline
         \end{array}
     $$
     \smallskip 
      $^{{a}}$  The
        alternative scenario, in which only part of the observed
        velocity dispersion is attributed to the disk (see Sect.~\ref{sec:discuss}).
   \end{table}