Astronomy & Astrophysics

All Figures

$\begin{figure} \par\includegraphics[width=18cm,clip]{3118fig1.eps} \end{figure}$ Figure 1: Plateau de Bure maps of the Red Rectangle in CO J=2-1 for a velocity resolution of 0.6 km s^-1 (continuum not subtracted). The central LSR velocity (in km s^-1) of each channel map is indicated in the top-left corners. The first contour and the separation between contours is 0.2 Jy beam^-1 (equivalent to 7.09 K in $T_{\rm mb}$ units). We also present the clean beam at half-maximum (black ellipse) and the continuum map (contour separation equal to 0.02 Jy beam^-1). The coordinate offsets are given with respect to the central position of the continuum, indicated in the figure.
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In the text

$\begin{figure} \par\includegraphics[width=18cm,clip]{3118fig2.eps} \end{figure}$ Figure 2: Plateau de Bure maps of the Red Rectangle in CO J=1-0 for a velocity resolution of 0.6 km s^-1 (continuum not subtracted). The central LSR velocity (in km s^-1) of each channel map is indicated in the top-left corners. The first contour and the separation between contours is 0.1 Jy beam^-1 (equivalent to 3.53 K in $T_{\rm mb}$ units). We also present the clean beam at half-maximum (black ellipse) and the continuum map (contour separation equal to 0.005 Jy beam^-1). The coordinate offsets are given with respect to the same central position as in Fig. 1.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{3118fig3.eps} \end{figure}$ Figure 3: Velocity-position diagrams of the CO J=2-1 and J=1-0 lines along the direction of the CO disk (at a position angle equal to 101 $^\circ$ ) and perpendicular to the axis of the optical image of the nebula. The lowest panels show the best theoretical fit from our model calculations. Contours are as in Figs. 1 and 2 for both observations and calculations. Continuum emission has not been subtracted and has been accounted for in our models.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{3118fig4.eps} \end{figure}$ Figure 4: Velocity-position diagram along the direction of the axis of the nebula (i.e. at position angle PA = 11 $^\circ$ ) of the CO J=2-1 line. Contours are the same as in Figs. 1 and 3. Continuum emission has not been subtracted.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{3118fig5.eps} \end{figure}$ Figure 5: Residuals of our model fitting of the observed CO J=2-1 maps. We show a velocity-position diagram along the direction perpendicular to the axis of the optical image of the nebula, as in Fig. 3. Contours are -0.2 (dashed), 0, and 0.2 Jy beam^-1, with the same contour step as in Fig. 3.
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In the text

$\begin{figure} \par\includegraphics[width=7.8cm,clip]{3118fig6.eps} \end{figure}$ Figure 6: Synthetic velocity-position diagrams along the direction of the CO disk for models in which we have chosen combinations of the parameters different from those of our best fitting. Contours are as in Fig. 3. These predictions are considered to be less accurate by comparison with the data, see Appendix A. From top to bottom: A) Rotational velocity varying as $V_{\rm t} \propto 1/\sqrt {r}$ (Keplerian) in the whole disk. B) $V_{\rm t} \propto 1/r$ (angular momentum conservation) in the whole disk. C) Constant expansion velocity, $V_{\rm exp} = 0.6$ km s^-1, in the outer disk. D) No jump in the density at $r = R_{\rm kep}$ , but strong decrease from this point (Appendix A.4).
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{3118fig4.eps} \end{figure}$	Figure 4: Velocity-position diagram along the direction of the axis of the nebula (i.e. at position angle PA = 11 $^\circ$ ) of the CO J=2-1 line. Contours are the same as in Figs. 1 and 3. Continuum emission has not been subtracted.
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{3118fig5.eps} \end{figure}$	Figure 5: Residuals of our model fitting of the observed CO J=2-1 maps. We show a velocity-position diagram along the direction perpendicular to the axis of the optical image of the nebula, as in Fig. 3. Contours are -0.2 (dashed), 0, and 0.2 Jy beam^-1, with the same contour step as in Fig. 3.
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