\begin{table}%t1 \caption{\label{tab1}Summary of the physical quantities derived from the spectral features and morphological analysis.} \par %\centering \par \begin{tabular}{l l} \hline\hline \noalign{\smallskip} Obs. Spect. properties &\\ \hline $z$ (\lya\ 1215.7) & 5.563 \\ {\it FWHM} (\lya\ 1215.7) & 600 $\pm$ 100 $\rm km~s^{-1}$ \\ $EW_{0}$(\lya) & $\rm 59^{+195}_{-29}$~\AA~(89~\AA~from phot.\tablefootmark{\star})\\ $L$(\lya) & $\rm 3.8^{+0.3}_{-0.3}$ $\times$ 10$^{43}$ $\rm erg~s^{-1}$\\ $SFR_{0}$(\lya) & 31 $M_{\odot}/{\rm yr}$\\ \hline\noalign{\smallskip} $z$ (N~{\sc iv}] 1486) & 5.553 (1486.5 \AA)\\ {\it FWHM} (N~{\sc iv}] 1486) & 400 $\pm$ 100 $\rm km~s^{-1}$ \\ $EW_{0}$(N~{\sc iv}] 1486)& $\rm 22^{+64}_{-10}$~\AA~(33~\AA~from phot.\tablefootmark{\star})\\ $L$(N~{\sc iv}] 1486) & $\rm 1.3^{+0.3}_{-0.4}$ $\times$ 10$^{43}$ $\rm erg~s^{-1}$)\\[2pt] \hline\noalign{\smallskip} $L$(N~{\sc v} 1240--1243) & $<$1.06 $\pm$ 0.57 $\times$ 10$^{42}$ $\rm erg~s^{-1}$ \\ \hline\noalign{\smallskip} $L$(Si~{\sc iv} 1393.8--1402.8) & $<$1.13 $\pm$ 0.73 $\times$ 10$^{42}$ $\rm erg~s^{-1}$ \\ \hline\noalign{\smallskip} $L$(C~{\sc iv}] 1548.2--1550.8) & $<$6 $\times$ 10$^{42}$ $\rm erg~s^{-1}$ (2$\sigma$ limit)\tablefootmark{\dag}\\ \hline\noalign{\smallskip} $V$(\lya\ - N~{\sc iv}] 1486) & +457 $\pm$ 50 $\rm km~s^{-1}$ \\ \hline Morph. (rest-frame) & (kpc physical)\\ \hline $r_{\rm e}~(\lya)$ (GALFIT) & 0.08 $\pm$ 0.01 kpc (ACS \wi\ band) \\ $r_{\rm e}~(1400~\AA)$ (GALFIT) & 0.11 $\pm$ 0.01 kpc (ACS \wz\ band) \\ $r_{\rm e}~(3300~\AA)$ & $<$0.9 kpc (0.6$''$ seeing, ISAAC $K$s band)\\ $\rm S/G~(1400~\AA)$ (SExtr.)& 0.83 (S/G, ACS \wz\ band)\\ $\rm area~(1400~\AA)$ (SExtr.)& 8.8 kpc$^{2}$ (AREAF 303 pix., \wz\ band)\\ \hline \end{tabular} \tablefoot { \tablefoottext{\dag}{Continuum not detected, 2$\sigma$ of the noise fluctuations is adopted;} \tablefoottext{\star}{adopting the continuum derived from the ACS \wz\ band.}} \end{table}