\begin{table}%t1
\caption{\label{t1}Eighteen first periods associated with stable (S) and unstable (U) eigenvalues (minutes) for A) left panel: $B_{0}=10$~G with A1) left column: weak helicity, A2) middle column: moderate helicity, A3) right column: strong helicity and B) right panel: $B_{0}=100$~G with B1, B2, B3 the same as in A. Higher order modes were not considered.}
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\begin{tabular}{cccccccc}
\hline\hline
$P_{i}$&Weak &Moderate&Strong&& Weak&Moderate&Strong \\ 
\hline
$P_{1}$&$1.921 \ S $&$0.209 \ S$&$0.525 \ i \ U$&$ \ \ \ $&$0.159 \ S$&$0.021 \ S$&$0.052 \ i \ U$\\
$P_{2}$&$1.869 \ S $&$0.204 \ S$&$0.450 \ S$&$ \ \ \  $& $0.158 \ S$&$0.020 \ S$&$0.044 \ S$\\ 
$P_{3}$&$1.535 \ S $&$0.169 \ S$&$0.430 \ S$&$ \ \ \  $& $0.154 \ S$&$0.017 \ S$& $0.042 \ S$ \\ 
$P_{4}$&$1.533 \ S $&$0.168 \ S$&$0.424 \ i \ U$&$ \ \ \  $& $0.153 \ S$&$0.0167 \ S$&$0.042 \ i \ U$\\  
$P_{5}$&$1.306 \ S  $&$0.143 \ S$&$0.206 \ i \ U$& $ \ \ \  $&$0.151 \ S$&$0.014 \ S$&$0.020 \ i \ U$\\  
$P_{6}$&$1.228 \ S  $&$0.135 \ S$&$0.177  \ i \ U$&$ \ \ \  $& $0.15 \ S $&$0.013 \ S$&$0.017 \ i \ U$\\  
\hline 
$P_{7}$&$0.068  \ i \ S$&$0.070 \ i \ U$&$0.125 \ S$&$ \ \ \  $& $0.0047 \ i \ S$&$0.007 \ i \ U$&$0.0125 \ S$\\  
$P_{8}$&$0.064  \ i \ S$&$0.066 \ i  \ U$&$0.122 \ S$&$ \ \ \  $& $0.0046 \ i \ S$&$0.006 \ i  \ U$&$0.012 \ S$\\  
$P_{9}$&$0.042  \ i \ S $&$0.044 \ i  \ U$&$0.101 \ S$&$ \ \ \  $& $0.0044 \ i  \ S$&$0.0043 \ i \ U$&$0.0101 \ S$\\  
$P_{10}$&$0.041  \ i  \ S$&$0.043  \ i \ U $&$0.100 \ S$&$ \ \ \  $&  $0.0043  \ i  \ S$&$0.0042 \ i  \ U$&$0.01 \ S$\\  
$P_{11}$&$0.033 \ S  $&$0.036 \ S$&$0.989 \ S$&$ \ \ \ $&  $0.0042 \ i  \ S$& $0.0036 \ S$&$0.099 \ S$\\  
$P_{12}$&$0.032 \ S  $&$0.035 \ S$ &$0.096 \ S$&$ \ \ \  $&  $0.0041 \ i  \ S$&$0.0035 \ S$ &$0.0096 \ S$\\  
 $P_{13}$&$0.030  \ i \ S $&$0.031 \ i \ U$ &$0.085 \ S$&$ \ \ \  $&$0.003 \ S$&$0.0031 \ i \ U$ &$0.0086 \ S $\\  
$P_{14}$ & $0.027  \ i \ S $&$0.029  \ i  \ U$&$0.081 \ S $&$ \ \ \  $&$0.0026 \ S$&$0.003 \ i  \ U$&$0.0081 \ S $\\  
$P_{15}$&$0.025 \ S $&$0.027 \ S $&$0.077 \ S  $&$ \ \ \  $&$0.0025 \ S $&$0.0027  \ S  $&$0.0077 \ S $\\  
$P_{16}$&$0.024 \ S $&$0.026 \ S $&$0.076 \ S  $&$ \ \ \  $&$0.002 \ S $&$0.003  \ S  $&$0.0076 \ S $\\ 
$P_{17}$&$0.02 \ S $&$0.02 \ S $&$0.063 \ S  $&$ \ \ \  $&$0.0024 \ S $&$0.0021  \ S  $&$0.0063 \ S $\\  
$P_{18}$&$0.018 \ S $&$0.02 \ S $&$0.059 \ S  $&$ \ \ \    $&$0.0024 \ S $&$0.0025  \ S  $&$0.006 \ S $\\  
\hline
\end{tabular}
\end{table}