\begin{table}%t1
%\centering
\par
\caption{\label{tab-seds}{Results of fits of one and two emission
components to the measured spectral energy distributions~(SEDs) of the
MIPS, PACS, SPIRE data of M~33 shown in Fig.~\ref{fig-seds}.}}
\begin{tabular}{rrrrrrr}   
\hline \hline  \noalign{\smallskip}
 & Total & (1) & (2) & (3) & (4) \\
  \hline  
 \multicolumn{4}{l}{Isothermal fits} \\
 $T$/[K] & 29 & 25 & 28 & 105 & 37 \\
 $\beta$ & 0.5 & 1.4 & 0.8 & $-$1.8 & $-$0.8 \\
 $\chi^2_{\rm red}$  &   45 &  44 &  45 &  3 & 6 \\  
\noalign{\smallskip} \hline  
 \multicolumn{4}{l}{Two-component fits with $\beta=2$} \\ 
 $T_{\rm c}$/[K] & 16 & 20 & 17 & 14 & 12 \\
 $T_{\rm w}$/[K] & 50 & 55 & 51 & 49 & 48 \\ 
 $M_{\rm c}$/[$10^6~$\msol]        &    8.0  & 1.0  & 2.4  & 3.6  & 4.0 \\
 $M_{\rm c}/M_{\rm w}$ & 1000 & 900  & 900  & 1700 & 5600 \\
 $\chi^2_{\rm red}$  &  0.41 & 0.23 & 0.33 & 0.42 & 1.8 \\   
 $M_{\rm gas}/M_{\rm c}$ &    250  & 230  & 180  & 160  & 200 \\
 \hline   
 \multicolumn{4}{l}{Two-component fits with $\beta=1.5$} \\ 
 $T_{\rm c}$/[K] & 19 & 24 & 20 & 16 & 13 \\
 $T_{\rm w}$/[K] & 55 & 77 & 57 & 52 & 51 \\
 $M_{\rm c}$/[$10^{6}$~\msol] & 10 & 1.2 & 3.0 & 4.6 & 4.9 \\ 
 $M_{\rm c}/M_{\rm w}$ & 500 & 3800 & 480 & 730 & 2200 \\
 $\chi^2_{\rm red}$ 
           & 0.14 & 0.10 & 0.12 & 0.20 & 1.8 \\
 $M_{\rm gas}/M_{\rm c}$ & 200 & 190 & 150 & 120 & 160 \\ 
 \hline 
 \multicolumn{4}{l}{Two-component fits with $\beta=1$} \\ 
 $T_{\rm c}$/[K] & 23 & 28 & 24 & 19 & 15 \\
 $T_{\rm w}$/[K] & 62 & -- & 67 & 57 & 55 \\
 $M_{\rm c}$/[$10^6~$\msol]        & 12   & 1.6  & 3.6  & 5.7  & 5.8 \\
 $M_{\rm c}/M_{\rm w}$  & 300  & --    & 440  & 330  & 870 \\
 $\chi^2_{\rm red}$  & 0.22 & 0.6 & 0.26 & 0.30 & 2.4 \\
 $M_{\rm gas}/M_{\rm c}$  & 170  & 140  & 120  & 100   & 140  \\
 \hline 
 \multicolumn{4}{l}{Total gas mass} \\
 $M_{\rm gas}/[10^6~$\msol] & 2020 & 230 & 440 & 560 & 790 \\ 
 \hline 
\end{tabular}   
\tablefoot{For the
  two-component fits, the dust emissivity index was kept fixed. $T_{\rm c}$,
  $T_{\rm w}$ are the temperatures of the cold and warm component. $M_{\rm c}$ is
  the total cold dust mass per annulus. $M_{\rm c}/M_{\rm w}$ is the dust mass ratio
  of both components. $\chi^2_{\rm red}$ is the
  $\chi^2$ divided by the number of observed parameters minus the number
  of fitted parameters minus 1. The 100~$\mu$m flux density measured
  in the outermost zone was not used for the fits. The columns give the
  radial annuli: Total: $0<R<8$~kpc, (1): $0<R<2$~kpc, (2):
  $2<R<4$~kpc, (3): $4<R<6$~kpc, (4): $6<R<8$~kpc. The last line at
  the bottom of the table gives the total gas masses $M_{\rm
    gas}=1.36~(M({\rm H}_2)+M($\HI$))$ \citep{gratier2010}.}
\end{table}