All Figures

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f1.ps} \end{figure}$ Figure 1: H₂ continuum subtracted image. In the field at least five jets are recognizable: a main jet more than 0.3 parsec long, composed by the knots from A to I and four other jets composed by the knots E1-E3, 57N-S, 57E-W and 25N-S, respectively. Other H₂condensations not clearly associated with any of the cited jets are indicated with a dash. The positions of the candidate exciting sources (# 25, 37, 40, 57 in our internal classification, M99) are indicated with a cross. Source #57 is the near-infrared counterpart of IRAS08448-4343.
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In the text

$\begin{figure} \par\includegraphics[width=17.1cm,clip]{1959f2.ps} \end{figure}$ Figure 2: Portions of the L ( left), M ( middle) and N ( right) images of the IRS17 field. Sources exciting the jets are labelled.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f3.ps} \end{figure}$ Figure 3: Medium-resolution profile of the H₂ 2.1218 $\mu$ m line of the knots D1 and F0, which are symmetrically located with respect to the candidate exciting source. The velocity is referred to the ambient cloud velocity.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8cm,clip]{1959f4.ps} \end{figure}$ Figure 4: The 1.2 mm continuum emission map overlaid with the SofI/NTT image (by L02) through the H₂ narrowband filter (centred at 2.12 $\mu$ m). The contour levels range from 45 to 990 mJy/beam in steps of 45 mJy/beam ( $\sim$ $3~\sigma$ ) and from 1000 to 1670 mJy/beam in steps of 200 mJy/beam. The coordinates of the mm peak are: $\alpha _{(2000)}$ = 08 $^{\rm h}$ 46 $^{\rm m}$ 33.6 $^{\rm s}$ , $\delta _{(2000)}$ = -43 $^{\circ }$ 54 $^{\prime }$ 38 $^{\prime \prime }$ . The beam size is shown in the bottom right corner. The IRAS uncertainty ellipse (95% of confidence) is also drawn and the NIR sources #40 and #57 are indicated.
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In the text

$\begin{figure} \par {\hspace*{3cm}\includegraphics[angle=-90,width=5.72cm,clip]{... ...ace*{2mm} \includegraphics[angle=-90,width=5.72cm,clip]{1959f5c.ps} \end{figure}$ Figure 5: The distribution of $\int$ ( $T_{\rm MB}$ dv) for CS(2-1) ( top), CS(5-4) ( bottom left) and CS(7-6) ( bottom right). Lowest contour level and contour step are : 1 and 2 K km s^-1 for CS(2-1) and CS(5-4); 0.5 and 0.5 K km s^-1 for CS(7-6). The grid positions (arcsec) are offsets from the IRAS source. The position of complex #40 and of the dust peak are marked with a cross and a triangle, respectively. The beam size is shown in the top left corner. Dots indicate the knots of the H₂ main jet.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f6.ps} \end{figure}$ Figure 6: Countour plot showing the H₂ emission (not continuum-subtracted) around the source #40. Contours are in steps of 9 $\sigma$ from a 3 $\sigma$ level of $9\times 10^{-17}$ erg s^-1 cm^-2 arcsec^-1. At the ISAAC spatial resolution, #40 is resolved into six 2 $\mu$ m peaks, labelled from 1 to 6. Among them, #40-3 is that better aligned with the inner knots of the main jet (F0, F1 and D1).
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f7.ps} \end{figure}$ Figure 7: Radial velocity as a function of the distance from #40.
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In the text

$\begin{figure} \par\includegraphics[width=13.2cm,clip]{1959f8.ps} \end{figure}$ Figure 8: a) Contours of the H₂ (continuum-subtracted) emission in the neighborhood of source #57. The identified jets are indicated with straight lines. Contours are in steps of 1 $\sigma$ , from a 2 $\sigma$ level of $6\times 10^{-17}$ erg s^-1 cm^-2 arcsec^-1. b) Contours of the H₂ (continuum-subtracted) emission of the knots E1-E3, from a 4 $\sigma$ level of $1.2\times 10^{-16}$ erg s^-1 cm^-2 arcsec^-1and in steps of 2 $\sigma$ . In both panels knots of shocked gas as well as stars recognized as intrinsically red by M99 are labelled.
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In the text

$\begin{figure} \par\includegraphics[width=13.2cm,clip]{1959f9.ps} \end{figure}$ Figure 9: Enlargments of the L and M images around source #40. In the L image contours are in steps of 3 $\sigma$ from a 3 $\sigma$ level of $\sim$ $4\times 10^{-13}$ erg s^-1 cm^-2 arcsec^-2while in the M image contours are in steps of 2 $\sigma$ from a 2 $\sigma$ level of $\sim$ $7\times 10^{-13}$ erg s^-1 cm^-2 arcsec^-2. The position of #40-3 is indicated by a small circle in both panels.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.8cm,clip]{1959f10.ps} \end{figure}$ Figure 10: The 1.2 mm continuum emission map overlaid with the MSX greyscale image in the E band (21.3 $\mu$ m). The contour levels range from 45 to 990 mJy/beam in steps of 90 mJy/beam and from 1000 to 1600 mJy/beam in steps of 200 mJy/beam.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f11.ps} \end{figure}$ Figure 11: Spectral energy distribution of the sources identified as the possible drivers of the H₂ jets in the field. The #40 SED is represented by the long-dashed and short-dashed lines if half and one hundredth of the 60 and 100 $\mu$ m IRAS fluxes is attributed to this source, respectively. The L and M points of #40-3 correspond to the magnitudes computed with aperture phometry at the source coordinates. The downward arrow represents the 3 $\sigma$ lower limit of the magnitude in N band of #37.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=13cm,clip]{1959f12.ps} \end{figure}$ Figure 12: Output of the LVG model for the CS emission. The yielded values of N(CS) (cm^-2) and $n_{\rm H_2}$ (cm^-3) are superimposed on the CS J=7-6 map. Source #57 is in (0, 0). Source #40 and the dust peak are indicated with a cross and a triangle, respectively.
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In the text

$\begin{figure} \par\includegraphics[width=17.1cm,clip]{1959f2.ps} \end{figure}$	Figure 2: Portions of the L ( left), M ( middle) and N ( right) images of the IRS17 field. Sources exciting the jets are labelled.
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f3.ps} \end{figure}$	Figure 3: Medium-resolution profile of the H₂ 2.1218 $\mu$ m line of the knots D1 and F0, which are symmetrically located with respect to the candidate exciting source. The velocity is referred to the ambient cloud velocity.
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1959f7.ps} \end{figure}$	Figure 7: Radial velocity as a function of the distance from #40.
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$\begin{figure} \par\includegraphics[width=13.2cm,clip]{1959f9.ps} \end{figure}$	Figure 9: Enlargments of the L and M images around source #40. In the L image contours are in steps of 3 $\sigma$ from a 3 $\sigma$ level of $\sim$ $4\times 10^{-13}$ erg s^-1 cm^-2 arcsec^-2while in the M image contours are in steps of 2 $\sigma$ from a 2 $\sigma$ level of $\sim$ $7\times 10^{-13}$ erg s^-1 cm^-2 arcsec^-2. The position of #40-3 is indicated by a small circle in both panels.
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$\begin{figure} \par\includegraphics[angle=-90,width=8.8cm,clip]{1959f10.ps} \end{figure}$	Figure 10: The 1.2 mm continuum emission map overlaid with the MSX greyscale image in the E band (21.3 $\mu$ m). The contour levels range from 45 to 990 mJy/beam in steps of 90 mJy/beam and from 1000 to 1600 mJy/beam in steps of 200 mJy/beam.
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$\begin{figure} \par\includegraphics[angle=-90,width=13cm,clip]{1959f12.ps} \end{figure}$	Figure 12: Output of the LVG model for the CS emission. The yielded values of N(CS) (cm^-2) and $n_{\rm H_2}$ (cm^-3) are superimposed on the CS J=7-6 map. Source #57 is in (0, 0). Source #40 and the dust peak are indicated with a cross and a triangle, respectively.
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