All Figures

$\begin{figure} \par\includegraphics[width=17.1cm,clip]{7254fig1.eps} \end{figure}$ Figure 1: a) CO(1-0) (grey scale) and CO(2-1) (contours) integrated maps with a clip at zero and no correction for primary beam attenuation. The color scale is given on the right hand-side in Jy beam^-1 km s^-1. The contours start at 4 $\sigma$ and are spaced by 10 $\sigma$ with $\sigma$ = 0.38 Jy beam^-1 km s^-1. The 115 GHz and 230 GHz beams are shown on the bottom right and left respectively. The axes give the angular offset from the phase center (symbolized by the cross) in arcseconds. We recall that, at 17 Mpc, 1'' corresponds to 82 pc along the major axis. b) CO(2-1)/CO(1-0) ratio map with the CO(1-0) contours overlaid. The contours start at 4 $\sigma$ and are spaced by 10 $\sigma$ , where $\sigma$ = 0.27 Jy beam^-1 km s^-1. c) HST H $\alpha$ greyscale with CO(1-0) contours.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=13.35cm,clip]{7254fig2.ps}\vspace*{5mm} \includegraphics[width=13.55cm,clip]{7254fig3CMJN.eps}\end{figure}$ Figure 2: CO(1-0) channel maps. The velocity relative to the systemic velocity of the galaxy ( $v_{\rm hel}$ = 235 km s^-1) is given at the top left of each map. The phase center symbolized by the cross is at $\alpha _{J2000}$ = $\rm 12^h 36^m 49.8^s$ , $\delta _{J2000}$ = $13^{\circ }09'46.3''$ . The beam is 1.8'' $\times$ 1.1'' and the rms is 2.1 mJy beam^-1. The contours start at 4 $\sigma$ and the levels are separated by 20 $\sigma$ . In the bottom panel the channel maps are overlaid with thick lines emphasizing the two "arms'' seen at low level (see Sect. 2.3).
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=13.9cm,clip]{7254fig4.ps} \end{figure}$ Figure 3: CO(2-1) channel maps. The beam is 1.1'' $\times$ 0.7'' and the rms is 3.7 mJy beam^-1. The contours start at 4 $\sigma$ and the levels are separated by 20 $\sigma$ .
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{7254fig5.eps} \end{figure}$ Figure 4: First moment map of the CO(1-0) emission. Regions with low S/N are masked out. The contour levels are spaced by 10 km s^-1. The color scale is given on the right hand-side in km s^-1.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=16.3cm,clip]{7254fig6.ps} \end{figure}$ Figure 5: Left: RGB color image synthesized from B, V and H broad band images obtained from Observatoire de Haute Provence (OHP) and retrieved from the Goldmine database (Gavazzi et al. 2003). North is up and East is left. Right: V-I color index from HST WFPC2-camera observations ( F555W and F814W filters, proposal 05375). The color scale is such that high V-I index appears in yellow and low V-I in blue.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=4.1cm,clip]{7254fig7.ps}\includegraphi... ...clip]{7254fig25.ps}\includegraphics[width=4.1cm,clip]{7254fig26.ps} \end{figure}$ Figure 6: Each row shows a 50'' $\times$ 50'' channel map of the observed data, the axisymmetric model, the ellipse orbit model and the barred potential model respectively ( from left to right) at a given velocity. From top to bottom the velocities are -80, -50, 0, 50 and 80 km s^-1. We recall that, at 17 Mpc, 1'' corresponds to 82 pc along the major axis.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=4.38cm,clip]{7254fig27.eps}\includegra... ....1mm} \includegraphics[height=4.05cm,width=4.6cm,clip]{7254fig34.ps}\end{figure}$ Figure 7: Integrated maps ( first row) and first moment maps ( second row) for a) the observed data, b) the axisymmetric model, c) the ellipse orbit model and d) the barred potential model. In the observations, the velocity field can only be computed where the signal-to-noise ratio is high enough, i.e. within a chevron shaped field. For comparison we used the same mask when computing the velocity fields from the models.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=5.45cm,clip]{7254fig35.eps}\includegra... ...clip]{7254fig36.ps}\includegraphics[width=4.9cm,clip]{7254fig37.ps} \end{figure}$ Figure 8: Deprojected integrated CO(1-0) emission of a) the axisymmetric model, b) the ellipse orbit model and c) the barred potential model. We recall that, at 17 Mpc, 1'' $\sim$ 82 pc along the major axis.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=5.4cm,clip]{7254fig38.eps}\hspace*{3mm... ....eps}\hspace*{3mm}\includegraphics[width=5.7cm,clip]{7254fig40.eps} \end{figure}$ Figure 9: Orbit patterns in the inner 1.5 kpc of the elliptical orbit model ( left) and the barred potential model ( middle). Right-hand side: resonance diagram, with the rotation frequency ( $\Omega$ ) plotted in red, $\Omega -\kappa /2$ in blue, and $\Omega +\kappa /2$ in cyan. The rotation curve is overplotted in black with the scale on the right-hand axis.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{7254fig41.ps}\hspace*{9mm}... ...43.ps}\hspace*{6mm}\includegraphics[width=7.2cm,clip]{7254fig44.ps} \end{figure}$ Figure 10: a) Net gravity torque, b) radial velocity, c) radial velocity gradient and d) mass accumulation rate versus characteristic radius of the orbits (see Sect. 4 for details). All the quantities computed for the maximum bar strength, $\epsilon =0.05$ .
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=13.9cm,clip]{7254fig4.ps} \end{figure}$	Figure 3: CO(2-1) channel maps. The beam is 1.1'' $\times$ 0.7'' and the rms is 3.7 mJy beam^-1. The contours start at 4 $\sigma$ and the levels are separated by 20 $\sigma$ .
Open with DEXTER

$\begin{figure} \par\includegraphics[width=8cm,clip]{7254fig5.eps} \end{figure}$	Figure 4: First moment map of the CO(1-0) emission. Regions with low S/N are masked out. The contour levels are spaced by 10 km s^-1. The color scale is given on the right hand-side in km s^-1.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=4.1cm,clip]{7254fig7.ps}\includegraphi... ...clip]{7254fig25.ps}\includegraphics[width=4.1cm,clip]{7254fig26.ps} \end{figure}$	Figure 6: Each row shows a 50'' $\times$ 50'' channel map of the observed data, the axisymmetric model, the ellipse orbit model and the barred potential model respectively ( from left to right) at a given velocity. From top to bottom the velocities are -80, -50, 0, 50 and 80 km s^-1. We recall that, at 17 Mpc, 1'' corresponds to 82 pc along the major axis.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=5.45cm,clip]{7254fig35.eps}\includegra... ...clip]{7254fig36.ps}\includegraphics[width=4.9cm,clip]{7254fig37.ps} \end{figure}$	Figure 8: Deprojected integrated CO(1-0) emission of a) the axisymmetric model, b) the ellipse orbit model and c) the barred potential model. We recall that, at 17 Mpc, 1'' $\sim$ 82 pc along the major axis.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=5.4cm,clip]{7254fig38.eps}\hspace{3mm... ....eps}\hspace{3mm}\includegraphics[width=5.7cm,clip]{7254fig40.eps} \end{figure}$	Figure 9: Orbit patterns in the inner 1.5 kpc of the elliptical orbit model ( left) and the barred potential model ( middle). Right-hand side: resonance diagram, with the rotation frequency ( $\Omega$ ) plotted in red, $\Omega -\kappa /2$ in blue, and $\Omega +\kappa /2$ in cyan. The rotation curve is overplotted in black with the scale on the right-hand axis.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{7254fig41.ps}\hspace{9mm}... ...43.ps}\hspace{6mm}\includegraphics[width=7.2cm,clip]{7254fig44.ps} \end{figure}$	Figure 10: a) Net gravity torque, b) radial velocity, c) radial velocity gradient and d) mass accumulation rate versus characteristic radius of the orbits (see Sect. 4 for details). All the quantities computed for the maximum bar strength, $\epsilon =0.05$ .
Open with DEXTER