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$\begin{figure} \par\psfig{figure=ms3753_fig1.ps,width=8cm,height=13.5cm,angle=0} \end{figure}$ Figure 1: a) BLUE-shifted outflow (solid dots) measured parallel to the minor axis at $\theta = -20''$ ( ${\it r} =-300$ pc) to the West of the center. The gray symbols (open circles: M-95) represent the outflow along the minor axis ( ${\it r} = 0$ ). The dashed-dotted lines indicate a galactic disk of $\pm$ 200 pc thickness. The projected rotation of the disk is $v(-300) \approx -100$ km s^-1, as seen at visible wavelengths. b) RED-shifted outflow (solid dots) measured parallel to the minor axis at $\theta = 20''$ ( ${\it r} = 300$ pc) to the East of the center. The projected rotation of the disk is $v(300) \approx 85$ km s^-1, as seen at visible wavelengths.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig2.ps,width=8.0cm,angle=0} \end{figure}$ Figure 2: Red-shifted outflow (dots) measured parallel to the minor axis at $\theta \approx 40''$ ( ${\it r} \approx 600$ pc) to the East of the center, and Blue-shifted outflow (triangles) measured at $\theta$ $\approx$ - 40'' ( ${\it r} \approx -600$ pc) to the West of the center. The dashed-dotted lines indicate a galactic disk of $\pm$ 200 pc thickness. The projected rotation velocity of the disk is $v(\pm 600) \approx \pm 100$ km s^-1. The velocity difference between the Western and Eastern branch at the SE and NW side of the disk can be taken as evidence of rotation. For the straight lines on the SE and NW side see Sect. 6.4.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig3.ps,width=8.3cm,angle=0} \end{figure}$ Figure 3: H $_{\alpha }$ 6563 Å ( left) and [NII] 6583 Å ( right) emission lines observed (4.2 m WHT) parallel and close to the minor axis ( $\mid$ $\theta$ $\mid$ $\leq$ 5''). The spatial direction is vertical, NW is at the top, SE at the bottom; the wavelength (velocity) direction is horizontal. The profiles show on the SE side at ${\it z} \approx -1$ kpc distance some emission between the velocity-split cone sections (*). Note the breakout from cone wall III (SE side, blue-shifted) close to the galactic disk (+).
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig4.ps,width=8.2cm,angle=0} \end{figure}$ Figure 4: Illustration of an idealized outflow cone on the SE and NW side of the galactic disk. E $_{\rm c}$ : plane of the slit along the minor axis through the center of the galaxy, producing the velocity branches (I, II, III, IV) $_{\rm c}$ (on-axis profile in Fig. 1); E₂₀: plane of the slit parallel to the minor axis at $\theta = 20$ '' to the East of the center, producing the velocity branches (I, II, III, IV) $_{\rm 20}$ (Fig. 1b) (similar for $\theta = -20''$ , West). The rotation of the disk $v_{\rm d}$ and of the halo material $V_{\rm rot}$ is shown. $\epsilon = 90\hbox {$^\circ $ }- {\it i}$ is the tilt of the galaxy. For a similar schematic see HAM-90.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig5.ps,width=7.3cm,height=8.5cm,angle=0} \end{figure}$ Figure 5: Momentum conservation of outflow material moving outwards along the cone walls (a tangential element is shown). The arrow indicates the trajectory of the outflowing material.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig6.ps,width=8.0cm,height=17.5cm,angle=0} \end{figure}$ Figure 6: Illustration of the agreement between the observation and the adopted cone model (Table 2). The displayed data are the averages of the velocities determined from the H $_{\alpha }$ , [NII] and [SII] lines. Open circles: front sides of the cone; dots: rear sides. The solid lines represent the calulated velocity branches when rotation around the minor axis with angular momentum conservation L $_{\rm vis}$ is applied. Note that in the on-axis observation (top) the rotation velocity is perpendicular to the line-of-sight and hence not seen. The dashed lines show the calculated velocity branches without rotation around the minor axis. Observation West at $\theta = -20$ '' from the center, observation East at $\theta = 20$ '' from the center. The dashed-dotted line in the on-axis observation (top) is a calculation without the velocity shift of -100 km s^-1 of the cone at the NW side.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig7.ps,width=8.5cm,angle=0} \end{figure}$ Figure 7: Values of the rotation parameter $\gamma$ (Eqs. (11) and (12)) above (NW) and below (SE) the disk as derived from observations of CO material and visible cone wall material. We assume that the disk rotates homogeneously within $\mid$ z $\mid$ $\protect\la$ $\pm$ H $\approx$ $\pm$ 200 pc. Radio data based on the CO observations by Sofue et al. (1992) and Loiseau et al. (1990): triangles; based on CO observations by Seaquist & Clark (2001): dots; based on CO observations by Walter et al. (2002): squares. Optical data based on H $\alpha$ , [NII] and [SII] slit spectra parallel to the major axis by Heckathorn (1972): open circles; this paper: shaded circles. The lines represent the parameter $\gamma$ calculated for outflow with angular momentum conservation L $_{\rm vis}$ of cone wall gas with $\Omega = 25\hbox {$^\circ $ }$ and b = 300 pc (1) and b = 400 pc (2) as appropriate for visible material. The dashed lines refer in a similar way to angular momentum conservation L $_{\rm do}$ of CO cone wall gas with $\Omega$ = 50 $\hbox {$^\circ $ }$ and ${\it b} = 300$ pc (a) and $\Omega$ = 90 $\hbox {$^\circ $ }$ and b = 300 pc (b), as suggested by Seaquist & Clark (2001) and Walter et al. (2002).
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig8.ps,width=12.0cm,height=8.0cm} \end{figure}$ Figure 8: Momentum conserved rotation of the eastern part of the visible outflow material at the SE side of the disk; plotted as grayscale and lines of values L = V $_{\rm obs}\times {\it r}({\it z})$ = constant = 5, 15, 30, 45, 60 kpc $\times$ km s^-1 (from the minor axis to the outside). a) based on optical line observations by Heckathorn (1972) and this paper; b) calculated from the adopted model of Table 2. The solid lines show the calculated values V $_{\rm obs}\times {\it r}({\it z})$ = constant; the dashed lines show the calculated values V $_{\rm rot}\times {\it r}({\it z})$ = constant, in which the outflow velocity V $_{\rm out}$ has been removed.
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In the text

$\begin{figure} \par\psfig{figure=ms3753_fig5.ps,width=7.3cm,height=8.5cm,angle=0} \end{figure}$	Figure 5: Momentum conservation of outflow material moving outwards along the cone walls (a tangential element is shown). The arrow indicates the trajectory of the outflowing material.
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