\begin{table}%t3
    \caption{Main characteristics of computed models representative of~\rvari. Labels ranging from~0 to~4 indicate the location of the models in the HR~diagram displayed in Fig.~\ref{fig:HR-rvari}. From left to right, $M$~represents the stellar mass in solar masses~$\msol$; $\teff$~the effective temperature in~K (on a~logarithmic scale); $g$~the surface gravity in cgs (on a~logarithmic scale); $\xc$ the central hydrogen mass fraction; the age in Myr; $\alpha$ the mixing-length parameter; $\numin$~-- $\numax$ represents the frequency range~($\mu{\rm Hz}$) of predicted unstable modes; $\Delta z/H_p$~the size of the external convective zone normalised by the local pressure scaleheight measured at the bottom of the convection zone; $\Delta z/R_*$~the fraction of stellar radius occupied by the external convective zone; $\nufund$~the fundamental radial mode (in~$\mu{\rm Hz}$); and finally, $\bar \rho$~represents the stellar mean density (in~cgs).}\label{tab:models-instab}
%\centering
\small
    \begin{tabular}{ccccccccccccc}
    \hline
    \hline
\noalign{\smallskip}
 ID (ij) & $M$ & $\teff$ & $g$ & $\xc$ & Age & $\alpha$ & $\numin$ & $\numax$ & $\Delta z/H_p$ & 
     $\Delta z/R_*$ & $\nufund$ & $\bar \rho$ \\
\noalign{\smallskip}
      \hline
      00 & 1.75 & 3.859 & 3.94 & 0.302 & 1186 & 2.0 & 78 & 380 & 1.16 & 0.33 & 130.98 & 0.192\\
      01 & 1.75 & 3.859 & 3.94 &  0.302 & 1186 & 1.5 & 79 & 336 & 0.82 & 0.18 & 131.03 & 0.192\\
      02 & 1.75 & 3.859 & 3.94 &  0.303 & 1186 & 1.0 & 95 & 355 & 0.71 & 0.14 & 131.10 & 0.192\\
      03 & 1.75 & 3.859 & 3.94 &  0.303 & 1186 & 0.5 & 98 & 361 & 0.66 & 0.13 & 131.13 & 0.192\\
      \hline
      10 & 2.10 & 3.867 & 3.70 &  0.132 & 860 & 2.0 & 71 & 242 & 0.81 & 0.20 & 81.82 & 0.076\\
      11 & 2.10 & 3.868 & 3.70 &  0.132 & 860 & 1.5 & 77 & 250 & 0.75 & 0.18 & 81.82 & 0.076\\
      12 & 2.10 & 3.868 & 3.70 &  0.132 & 860 & 1.0 & 78 & 255 & 0.74 & 0.17 & 81.82 & 0.076\\
      13 & 2.10 & 3.868 & 3.70 &  0.132 & 860 & 0.5 & 78 & 267 & 0.71 & 0.16 & 81.83 & 0.076\\
      \hline
      20 & 2.01 & 3.850 & 3.69 &  0.121 & 985 & 2.0 & 63 & 218 & 1.03 & 0.33 & 81.32 & 0.075 \\
      21 & 2.01 & 3.850 & 3.69 &  0.120 & 985 & 1.5 & 66 & 216 & 0.70 & 0.18 & 81.32 & 0.075\\
      22 & 2.01 & 3.850 & 3.69 &  0.120 & 985 & 1.0 & 66 & 225 & 0.70 & 0.18 & 81.32 & 0.075\\
      23 & 2.01 & 3.850 & 3.69 & 0.120 & 985 & 0.5 & 67 & 224  & 0.63 & 0.15 & 81.32 & 0.075\\
      \hline
      30 & 1.57 & 3.868 & 4.19 &  0.538 & 850 & 2.0 & 117 & 780 & 1.95 & 0.80 & 208.59 & 0.483\\
      31 & 1.57 & 3.868 & 4.19 &  0.538 & 850 & 1.5 & 124 & 491 & 0.87 & 0.16 & 208.50 & 0.483\\
      32 & 1.57 & 3.867 & 4.19 &  0.538 & 850 & 1.0 & 127 & 525 & 0.74 & 0.12 & 208.59 & 0.483\\
      33 & 1.57 & 3.867 & 4.19 &  0.538 & 850 & 0.5 & 127 & 551 & 0.69 & 0.11 & 208.49 & 0.483\\
      \hline
      40 & 1.49 & 3.850 & 4.19 &  0.521 & 1080 & 2.0 & 111 & 770 & 2.58 & 2.71 & 205.05 & 0.485\\
      41 & 1.49 & 3.850 & 4.19 &  0.540 & 985 & 1.5 & 119 & 785 & 1.83 & 0.77 & 211.31 & 0.494\\
      42 & 1.49 & 3.849 & 4.19 &  0.542 & 980 & 1.0 & 125 & 383 & 0.80 & 0.15 & 211.61 & 0.494\\
      43 & 1.49 & 3.850 & 4.19 &  0.543 & 975 & 0.5 & 125 & 406 & 0.67 & 0.12 & 212.00 & 0.494\\
      \hline
  \end{tabular}
\end{table}