All Figures

$\begin{figure} \par\mbox{\includegraphics[width=5.7cm,clip]{7584fig01.eps} \incl... ...{7584fig03.eps} \includegraphics[width=6.7cm,clip]{7584fig04.eps} } \end{figure}$ Figure 1: NGC 4441 - top left: H I distribution overlayed on optical DSS image. Contour levels are 2.8, 8.4, 14, 28, 56, 84 $\times$ $10^{19}~{\rm cm}^{-2}$ Marked are the optical features: the optical tail (OT), the inner shell (IS), the outer shell (OS) and the three optical knots, top right: H I distribution, contours same as above. Marked are the gaseous features as described in the text: the northern tail (NT), the northern clump (NC), the central ring (CR), the southern clump (SC), and the southern tail (ST), bottom left: velocity field, contour levels are 2570 to 2840 km s^-1, in steps of 30 km s^-1, bottom right: H I velocity dispersion (2nd moment). The cross marks the optical centre position.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=15.3cm,clip]{7584fig05.ps} \end{figure}$ Figure 2: Channel maps (robust weighted) of NGC 4441. The optical centre position is marked with a cross. The contour levels are -0.9, 1.1, 1.3, 1.5, 1.7, 1.8, 2 mJy beam^-1. The heliocentric velocity is given at the top left, the beam at the bottom left corner.
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In the text

$\begin{figure} \par\includegraphics[width=8.6cm,clip]{7584fig06.eps}\end{figure}$ Figure 3: R-band image (taken with the CAHA 2.2 m telescope) of the central region. H I is overlayed as contours, contour levels are from 2.8 to 10.08 $\times$ $10^{20}~{\rm cm}^{-2}$ in steps of 0.56 $\times$ $10^{20}~{\rm cm}^{-2}$ . The beamsize is shown in the upper left corner. The gas ring is centred on the optical nucleus, which exhibits a thin dust lane. The orientation of the dust lane is marked by the dashed line. In the lower left corner, the R-band image of the nucleus with the dust lane is shown.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=7.4cm,clip]{7584fig07.ps}\par\includegraphics[angle=-90,width=7.4cm,clip]{7584fig08.ps}\end{figure}$ Figure 4: Integrated H I spectrum of top: the total amount of H I in NGC 4441 and bottom: the central ring. In the total H I spectrum, the two narrow features around 2600 km s^-1 and 2780 km s^-1 correspond to the two tidal tails. The third peak at 2840 km s^-1 appears at the position of the northern clump.
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In the text

$\begin{figure} \par\includegraphics[width=8.1cm,clip]{7584fig09.ps}\end{figure}$ Figure 5: Inner part of velocity field of NGC 4441, which shows a fairly regular solid body rotation pattern. The contour levels are from 2775 to 2825 km s^-1, in steps of 25 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[width=7.4cm,clip]{7584fig10.ps}\end{figure}$ Figure 6: Position-velocity diagram of the major axis of the inner H I disc in NGC 4441. The position angle is $325^{\circ }$ . Shown are the 3 $\sigma$ contours of 0.9 mJy beam^-1.
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In the text

$\begin{figure} \par\includegraphics[width=6.7cm,clip]{7584fig11.ps}\end{figure}$ Figure 7: R-band image (CAHA) and contours of the 20 cm continuum flux. The beam is shown in the lower left corner of the image. Contour levels are 0.5, 1, 2, 5, 7.5, 10 mJy beam^-1.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=15.3cm,clip]{7584fig05.ps} \end{figure}$	Figure 2: Channel maps (robust weighted) of NGC 4441. The optical centre position is marked with a cross. The contour levels are -0.9, 1.1, 1.3, 1.5, 1.7, 1.8, 2 mJy beam^-1. The heliocentric velocity is given at the top left, the beam at the bottom left corner.
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$\begin{figure} \par\includegraphics[angle=-90,width=7.4cm,clip]{7584fig07.ps}\par\includegraphics[angle=-90,width=7.4cm,clip]{7584fig08.ps}\end{figure}$	Figure 4: Integrated H I spectrum of top: the total amount of H I in NGC 4441 and bottom: the central ring. In the total H I spectrum, the two narrow features around 2600 km s^-1 and 2780 km s^-1 correspond to the two tidal tails. The third peak at 2840 km s^-1 appears at the position of the northern clump.
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$\begin{figure} \par\includegraphics[width=8.1cm,clip]{7584fig09.ps}\end{figure}$	Figure 5: Inner part of velocity field of NGC 4441, which shows a fairly regular solid body rotation pattern. The contour levels are from 2775 to 2825 km s^-1, in steps of 25 km s^-1.
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$\begin{figure} \par\includegraphics[width=7.4cm,clip]{7584fig10.ps}\end{figure}$	Figure 6: Position-velocity diagram of the major axis of the inner H I disc in NGC 4441. The position angle is $325^{\circ }$ . Shown are the 3 $\sigma$ contours of 0.9 mJy beam^-1.
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$\begin{figure} \par\includegraphics[width=6.7cm,clip]{7584fig11.ps}\end{figure}$	Figure 7: R-band image (CAHA) and contours of the 20 cm continuum flux. The beam is shown in the lower left corner of the image. Contour levels are 0.5, 1, 2, 5, 7.5, 10 mJy beam^-1.
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