Astronomy & Astrophysics

All Figures

$\begin{figure} \par\includegraphics[width=8cm,clip]{1264fig1.eps} \end{figure}$ Figure 1: K' image of S87 in an area of $4' \times 4'$ . North is up and east to the left. The nebulae noted by Chen et al. (2003) are labelled.
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In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{1264fig2.eps} \end{figure}$ Figure 2: a) K'-band brightness contour map of S87E. The offsets are in arcsecs from the S87E-peak [ $\rm RA(1950)=19^{h}44^{m}13\hbox{$.\!\!^{\rm s}$ }1$ , $\rm Dec(1950)=24^{\circ }28'03''$ ], the K' peak of S87E. b) K'-band brightness contour map of S87W. The contours are drawn from 11.6 to 15.2 mag pixel^-1 with steps of 0.3 mag pixel^-1. Axes offsets are in arcsecs from the K' peak of S87W [NIRS A; $\rm RA(1950)=19^{h}44^{m}13\hbox{$.\!\!^{\rm s}$ }1$ , $\rm Dec(1950)=24^{\circ }28'03''$ ]. The "NS 1-5'' in two images represent the positions of the sources in K-band spectrometry observations.
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In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{1264fig3.eps} \end{figure}$ Figure 3: a) J-band polarization map of S87E with the same axis offsets as Fig. 2a. The length of the vectors represents the percentage polarization, and the orientation of the vectors represents the position angle of polarization with respect to the equatorial coordinate system. The 100% polarization vector is shown at bottom right of the frame. The superposed contours are shown in linear scale to mark the relative position of vectors. b) The same as a, but at H. c) The same as a, but at K'. The positions of the DES are marked by plus signs in three frames. The reflection knots are denoted as A-C in Fig. 3b.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1264fig4.eps} \end{figure}$ Figure 4: J-K' color image of S87E. The J-K' color is linearly scaled from 0 mag (white) to 5 mag (black). The superposed contour map is same as the K'-contour in Fig. 2a. Deeply embedded source is labelled "DES''. The CO molecular outflow is marked by a solid arrow (blueshifted) and dashed arrow (redshited). A dashed circle delineates the HII region.
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In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{1264fig5.eps} \end{figure}$ Figure 5: a) J-band polarization map of S87W with the same axis offsets as Fig. 2b. The length of the vectors represents the percentage polarization, and the orientation of the vectors represents the position angle of polarization with respect to the equatorial coordinate system; The 100% polarization vector is shown at top right of the frame. The superposed contours are shown in linear scale to mark the relative position of vectors. b) The same as a, but at H. c) The same as a, but at K'. The reflection knots are denoted as "D'' and "E'' in Fig. 5a.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1264fig6.eps} \end{figure}$ Figure 6: K-band moderate resolution ( $\lambda$ / $\Delta$ $\lambda$ $\sim$ 500) spectra of the observed sources in S87E a) and S87W b). Fluxes are shifted vertically for clarity. All line emissions identified are indicated.
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In the text

$\begin{figure} \par\includegraphics[width=8.7cm,clip]{1264fig7.eps} \end{figure}$ Figure 7: 2-1 S(1)/1-0 S(1) vs. 1-0 S(0)/1-0 S(1) diagram for the H₂ emissions. The data (filled circles) are compared to the theoretical predictions (open circle) of Draine & Bertoldi (1996) for pure fluorescence in a low density PDR ( $n_{\rm H} = 10 ^{4}$ cm^-3, $\chi = 10 ^{2}$ , T₀ = 500 K), emission from a PDR model (triangle) at higher density ( $n_{\rm H} = 10^{6}$ cm^-3, $\chi = 10^{4}$ , T₀ = 500 K and $n_{\rm H} = 10^{6}$ cm^-3, $\chi = 10^{5}$ , T₀ = 1000 K) that matched data for the Orion Bar (Luhman et al. 1998), and shock excitation (square) indicative of a shock ( T₀ = 2000 K; Blank & van Dishoeck 1987).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1264fig1.eps} \end{figure}$	Figure 1: K' image of S87 in an area of $4' \times 4'$ . North is up and east to the left. The nebulae noted by Chen et al. (2003) are labelled.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{1264fig4.eps} \end{figure}$	Figure 4: J-K' color image of S87E. The J-K' color is linearly scaled from 0 mag (white) to 5 mag (black). The superposed contour map is same as the K'-contour in Fig. 2a. Deeply embedded source is labelled "DES''. The CO molecular outflow is marked by a solid arrow (blueshifted) and dashed arrow (redshited). A dashed circle delineates the HII region.
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1264fig6.eps} \end{figure}$	Figure 6: K-band moderate resolution ( $\lambda$ / $\Delta$ $\lambda$ $\sim$ 500) spectra of the observed sources in S87E a) and S87W b). Fluxes are shifted vertically for clarity. All line emissions identified are indicated.
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