All Figures

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f2.eps} } \end{figure}$ Figure 2: NGC 1406 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $6'\times 6'$ (26 kpc $\times$ 26 kpc). Contours are at the 0.25 (=1.6 $\;\times\;$ 10²¹ cm^-2), 0.35, 0.5, ... 2.8 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f3.eps} } \end{figure}$ Figure 3: NGC 1406 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 2. The contours display the galaxy's systemic velocity of 1051 km s^-1 $\pm$ $(n\times 25)$ km s^-1, ranging from 901 km s^-1 to 1201 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f4.eps} } \end{figure}$ Figure 4: NGC 1406 pv diagram along the major axis, covering a radial range of ${\pm } 2\hbox {$.\mkern -4mu^\prime $ }5$ ( $\pm$ 10.8 kpc). Contours show surface brightness levels of -7, 7 (=2.5- $\sigma$ ), 10, 14, ..., 40 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f7.eps} } \end{figure}$ Figure 7: NGC 1511 group overlay of HI total intensity map on DSS-2 red optical image. The FOV is $15'\times 18'$ (76.4 kpc $\times$ 91.7 kpc). Contours are at the 0.05 (=1.5 $\;\times\;$ 10²⁰ cm^-2), 0.07, 0.1, ..., 1.6 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f8.eps} } \end{figure}$ Figure 8: HI velocity field of the NGC 1511 group, overlaid on our HI total intensity image. The FOV is the same as in Fig. 7. The contours display the galaxy's systemic velocity of 1335 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 1255 km s^-1 to 1415 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f9.eps} } \end{figure}$ Figure 9: NGC 1511 pv diagram along the major axis, covering a radial range of ${\pm } 5'$ ( $\pm$ 25.5 kpc). Contours show surface brightness levels of -2.8, -2, -1.4, 1.4 (=2.5- $\sigma$ ), 2, 2.8, ..., 22.4 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f11.eps} } \end{figure}$ Figure 11: NGC 4244 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $25'\times 25'$ (21.8 kpc $\times$ 21.8 kpc). Contours are at the 0.03 (=1.7 $\;\times\;$ 10²⁰ cm^-2), 0.042, 0.06, ..., 1.344 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f12.eps} } \end{figure}$ Figure 12: NGC 4244 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 11. The contours display the galaxy's systemic velocity of 244 km s^-1 $\pm$ $(n\times 15)$ km s^-1, ranging from 154 km s^-1 to 334 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[width=15.3cm,clip]{1671_f13.eps}\end{figure}$ Figure 13: NGC 4244 pv diagram along the major axis, covering a radial range of ${\pm } 13'$ ( $\pm$ 11.3 kpc). Contours show surface brightness levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, ..., 38.4 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=15.3cm,clip]{1671_f16.eps} } \end{figure}$ Figure 16: NGC 4565 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $25'\times 20'$ (70.6 kpc $\times$ 56.5 kpc). Contours are at the 0.035 (=1.5 $\;\times\;$ 10²⁰ cm^-2), 0.05, 0.07, ..., 2.24 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=15.4cm,clip]{1671_f17.eps} } \end{figure}$ Figure 17: HI velocity field of NGC 4565 and companions, overlaid on our HI total intensity image. The FOV is the same as in Fig. 16. The contours display the galaxy's systemic velocity of 1221 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 981 km s^-1 to 1441 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=15.4cm,clip]{1671_f18.eps} } \end{figure}$ Figure 18: NGC 4565 pv diagram along the major axis, covering a radial range of ${\pm } 12'$ ( $\pm$ 33.9 kpc). Contours show surface brightness levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, ..., 19.2 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f21.eps} } \end{figure}$ Figure 21: NGC 4700 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $6'\times 6'$ (44.5 kpc $\times$ 44.5 kpc). Contours are at the 0.05 (=1.9 $\;\times\;$ 10²⁰ cm^-2), 0.07, 0.1, ..., 1.12 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f22.eps} } \end{figure}$ Figure 22: NGC 4700 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 21. The contours display the galaxy's systemic velocity of 1404 km s^-1 $\pm$ $(n\times 10)$ km s^-1, ranging from 1344 km s^-1 to 1444 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f23.eps} } \end{figure}$ Figure 23: NGC 4700 pv diagram along the major axis, covering a radial range of ${\pm } 2\hbox {$.\mkern -4mu^\prime $ }5$ ( $\pm$ 18.6 kpc). Contours show surface brightness levels of -1.8, -0.9, 0.9 (=2.5- $\sigma$ ), 1.8, 3.6, ... 28.8 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=14cm,clip]{1671_f25.eps} } \end{figure}$ Figure 25: NGC 7090 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $8'\times 8'$ (27.5 kpc $\times$ 27.5 kpc). Contours are at the 0.10 (=3.8 $\;\times\;$ 10²⁰ cm^-2), 0.14, 0.2, ..., 1.6 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=8.4cm,clip]{1671_f26.eps} } \end{figure}$ Figure 26: NGC 7090 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 25. The contours display the galaxy's systemic velocity of 849 km s^-1 $\pm$ $(n\times 15)$ km s^-1, ranging from 744 km s^-1 to 924 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=8.6cm,clip]{1671_f27.eps} } \end{figure}$ Figure 27: NGC 7090 pv diagram along the major axis, covering a radial range of ${\pm } 4'$ ( $\pm$ 13.6 kpc). Contours show surface brightness levels of -4.0, -2.8, 2.8 (=2.5- $\sigma$ ), 4.0, 5.6, ... 22.4 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f29.eps} } \end{figure}$ Figure 29: NGC 7462 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $8'\times 6'$ (35.2 kpc $\times$ 26.4 kpc). Contours are at the 0.075 (=2.9 $\;\times\;$ 10²⁰ cm^-2), 0.106, 0.15, ..., 1.68 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f30.eps} } \end{figure}$ Figure 30: NGC 7462 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 29. The contours display the galaxy's systemic velocity of 1064 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 984 km s^-1 to 1144 km s^-1.
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f31.eps} } \end{figure}$ Figure 31: NGC 7462 pv diagram along the major axis, covering a radial range of ${\pm } 3'$ ( $\pm$ 13.2 kpc). Contours show surface brightness levels of -3, -1.5, 1.5 (=2.5- $\sigma$ ), 3, 6, 12, 24 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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In the text

$\begin{figure} \par {\includegraphics[width=14cm,clip]{1671_f1.ps} } \end{figure}$ Figure 1: NGC 1406 channel maps with a channel width of 15.7 km s^-1. The displayed field-of-view is $6'\times 6'$ (26 kpc $\times$ 26 kpc). Logarithmic contours are displayed at levels of -4, 4 (=2.5- $\sigma$ ), 8, 16, 32 mJy/beam (1 mJy/beam = 3.364 K antenna brightness temperature, $T_{\rm b}$ , for a $15''\times 12''$ beam). Negative contours are dashed. The cross in each channel shows the position of the galaxy centre. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=16.2cm,clip]{1671_f5.ps} } \end{figure}$ Figure 5: HI channel maps of NGC 1511 and its companions with a channel width of 14.8 km s^-1. The displayed field-of-view is $15'\times 18'$ (76.4 kpc $\times$ 91.7 kpc). Logarithmic contours are displayed at levels of -3.2, -1.6, 1.6 (=2.5- $\sigma$ ), 3.2, 6.4, 12.8, 25.6 mJy/beam (1 mJy/beam = 1.606 K antenna brightness temperature, $T_{\rm b}$ , for a $21\hbox{$.\!\!^{\prime\prime}$ }8\times17\hbox{$.\!\!^{\prime\prime}$ }3$ beam). Negative contours are dashed. The three crosses indicate the centre positions of NGC 1511, NGC 1511a and NGC 1511b. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=16.2cm,clip]{1671_f6.ps} } \end{figure}$ Figure 6: The same as Fig. 5, with a reduced field-of-view of $13'\times 6\hbox {$.\mkern -4mu^\prime $ }5$ (66.2 kpc $\times$ 33.1 kpc), zooming in on the galaxies NGC 1511 and NGC 1511b. The crosses mark the positions of the galaxy centres.
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In the text

$\begin{figure} \par {\includegraphics[width=18cm,clip]{1671_f10.ps} } \end{figure}$ Figure 10: NGC 4244 channel maps with a channel width of 16.5 km s^-1. The displayed field-of-view is $20'\times 20'$ (17.5 kpc $\times$ 17.5 kpc). Logarithmic contours are displayed at levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, 4.8, 9.6, 19.2, 38.4 mJy/beam (1 mJy/beam = 3.037 K antenna brightness temperature, $T_{\rm b}$ , for a $17\hbox{$.\!\!^{\prime\prime}$ }8\times11\hbox{$.\!\!^{\prime\prime}$ }2$ beam). Negative contours are dashed. The cross indicates the position of the galaxy centre. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=16.5cm,clip]{1671_f14.ps} } \end{figure}$ Figure 14: NGC 4565 channel maps with a channel width of 16.5 km s^-1. The displayed field-of-view is $15'\times 17'$ (42.3 kpc $\times$ 48.0 kpc). Logarithmic contours are displayed at levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, ..., 38.4 mJy/beam (1 mJy/beam = 2.176 K antenna brightness temperature, $T_{\rm b}$ , for a $26\hbox{$.\!\!^{\prime\prime}$ }0\times10\hbox{$.\!\!^{\prime\prime}$ }7$ beam). Negative contours are dashed. The cross indicates the position of the centre of NGC 4565. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=17.1cm,clip]{1671_f15.ps} } \end{figure}$ Figure 15: NGC 4565 channel maps with a channel width of 16.5 km s^-1 (continued).
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In the text

$\begin{figure} \par {\includegraphics[width=15.6cm,clip]{1671_f19.ps} } \end{figure}$ Figure 19: Channel maps of NGC 4700 and companion with a channel width of 16.0 km s^-1. The displayed field-of-view is $14'\times 22'$ (104 kpc $\times$ 163 kpc). Logarithmic contours are displayed at levels of -1.8, -0.9, 0.9, 1.8 (=2.5- $\sigma$ ), 3.6, 7.2, 14.4, 28.8 mJy/beam (1 mJy/beam = 2.018 K antenna brightness temperature, $T_{\rm b}$ , for a $20''\times 15''$ beam). Negative contours are dashed. The crosses indicate the positions of the galaxy centres. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=17.9cm,clip]{1671_f20.ps} } \end{figure}$ Figure 20: The same as in Fig. 19, now NGC 4700 only, with a reduced field-of-view of $6'\times 6'$ (44.5 kpc $\times$ 44.5 kpc).
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In the text

$\begin{figure} \par {\includegraphics[width=18cm,clip]{1671_f24.ps} } \end{figure}$ Figure 24: NGC 7090 channel maps with a channel width of 14.8 km s^-1. The displayed field-of-view is $8'\times 8'$ (27.5 kpc $\times$ 27.5 kpc). Logarithmic contours are displayed at levels of -9, -4.5, 4.5 (=2.5- $\sigma$ ), 9, 18, 36, 72 mJy/beam (1 mJy/beam = 2.194 K antenna brightness temperature, $T_{\rm b}$ , for a $20\hbox{$.\!\!^{\prime\prime}$ }0\times15\hbox{$.\!\!^{\prime\prime}$ }0$ beam). Negative contours are dashed. The cross indicates the position of the galaxy centre. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par {\includegraphics[width=18cm,clip]{1671_f28.ps} } \end{figure}$ Figure 28: NGC 7462 channel maps with a channel width of 14.8 km s^-1. The displayed field-of-view is $6'\times 6'$ (26.4 kpc $\times$ 26.4 kpc). Logarithmic contours are displayed at levels of -1.5, 1.5 (=2.5- $\sigma$ ), 3, 6, 12, 24 mJy/beam (1 mJy/beam = 2.015 K antenna brightness temperature, $T_{\rm b}$ , for a $22\hbox{$.\!\!^{\prime\prime}$ }1\times13\hbox{$.\!\!^{\prime\prime}$ }6$ beam). Negative contours are dashed. The cross indicates the position of the galaxy centre. The full width at half maximum of the beam is indicated in the lower left.
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1671_fa1.eps}\end{figure}$ Figure A.1: ATCA 1.38 GHz radio continuum image of NGC 1511, superimposed on a red DSS-2 optical plate. The contour levels are -0.092, -0.065, 0.065 (=2.5- $\sigma$ ), 0.092, 0.13, ..., 8 mJy beam^-1, spaced by factors of $\sqrt {2}$ .

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1671_fa2.eps}\end{figure}$ Figure A.2: Narrow-band VLA 1.4 GHz total intensity radio continuum image of NGC 4700, superimposed on a red DSS-2 optical plate. The contour levels are -0.25, 0.25 (=2.5- $\sigma$ ), 0.35, 0.5, ... 32 mJy beam^-1, spaced by factors of $\sqrt {2}$ .

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1671_fa3.eps}\end{figure}$ Figure A.3: ATCA 1.38 GHz radio continuum image of NGC 7090, superimposed on a red DSS-2 optical plate. The contour levels are -0.084, -0.06, 0.06 (=2.5- $\sigma$ ), 0.084, 0.12, ... 2 mJy beam^-1, spaced by factors of $\sqrt {2}$ .

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1671_fa4.eps}\end{figure}$ Figure A.4: ATCA 1.38 GHz radio continuum image of NGC 7462, superimposed on a red DSS-2 optical plate. The contour levels are -0.06, 0.06 (=2.5- $\sigma$ ), 0.084, 0.12, ... 2 mJy beam^-1, spaced by factors of $\sqrt {2}$ .

In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f2.eps} } \end{figure}$	Figure 2: NGC 1406 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $6'\times 6'$ (26 kpc $\times$ 26 kpc). Contours are at the 0.25 (=1.6 $\;\times\;$ 10²¹ cm^-2), 0.35, 0.5, ... 2.8 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f3.eps} } \end{figure}$	Figure 3: NGC 1406 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 2. The contours display the galaxy's systemic velocity of 1051 km s^-1 $\pm$ $(n\times 25)$ km s^-1, ranging from 901 km s^-1 to 1201 km s^-1.
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f4.eps} } \end{figure}$	Figure 4: NGC 1406 pv diagram along the major axis, covering a radial range of ${\pm } 2\hbox {$.\mkern -4mu^\prime $ }5$ ( $\pm$ 10.8 kpc). Contours show surface brightness levels of -7, 7 (=2.5- $\sigma$ ), 10, 14, ..., 40 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f7.eps} } \end{figure}$	Figure 7: NGC 1511 group overlay of HI total intensity map on DSS-2 red optical image. The FOV is $15'\times 18'$ (76.4 kpc $\times$ 91.7 kpc). Contours are at the 0.05 (=1.5 $\;\times\;$ 10²⁰ cm^-2), 0.07, 0.1, ..., 1.6 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f8.eps} } \end{figure}$	Figure 8: HI velocity field of the NGC 1511 group, overlaid on our HI total intensity image. The FOV is the same as in Fig. 7. The contours display the galaxy's systemic velocity of 1335 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 1255 km s^-1 to 1415 km s^-1.
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f9.eps} } \end{figure}$	Figure 9: NGC 1511 pv diagram along the major axis, covering a radial range of ${\pm } 5'$ ( $\pm$ 25.5 kpc). Contours show surface brightness levels of -2.8, -2, -1.4, 1.4 (=2.5- $\sigma$ ), 2, 2.8, ..., 22.4 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f11.eps} } \end{figure}$	Figure 11: NGC 4244 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $25'\times 25'$ (21.8 kpc $\times$ 21.8 kpc). Contours are at the 0.03 (=1.7 $\;\times\;$ 10²⁰ cm^-2), 0.042, 0.06, ..., 1.344 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f12.eps} } \end{figure}$	Figure 12: NGC 4244 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 11. The contours display the galaxy's systemic velocity of 244 km s^-1 $\pm$ $(n\times 15)$ km s^-1, ranging from 154 km s^-1 to 334 km s^-1.
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$\begin{figure} \par\includegraphics[width=15.3cm,clip]{1671_f13.eps}\end{figure}$	Figure 13: NGC 4244 pv diagram along the major axis, covering a radial range of ${\pm } 13'$ ( $\pm$ 11.3 kpc). Contours show surface brightness levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, ..., 38.4 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=15.3cm,clip]{1671_f16.eps} } \end{figure}$	Figure 16: NGC 4565 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $25'\times 20'$ (70.6 kpc $\times$ 56.5 kpc). Contours are at the 0.035 (=1.5 $\;\times\;$ 10²⁰ cm^-2), 0.05, 0.07, ..., 2.24 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=15.4cm,clip]{1671_f17.eps} } \end{figure}$	Figure 17: HI velocity field of NGC 4565 and companions, overlaid on our HI total intensity image. The FOV is the same as in Fig. 16. The contours display the galaxy's systemic velocity of 1221 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 981 km s^-1 to 1441 km s^-1.
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$\begin{figure} \par {\includegraphics[width=15.4cm,clip]{1671_f18.eps} } \end{figure}$	Figure 18: NGC 4565 pv diagram along the major axis, covering a radial range of ${\pm } 12'$ ( $\pm$ 33.9 kpc). Contours show surface brightness levels of -1.2, -0.6, 0.6 (=2.5- $\sigma$ ), 1.2, 2.4, ..., 19.2 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f21.eps} } \end{figure}$	Figure 21: NGC 4700 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $6'\times 6'$ (44.5 kpc $\times$ 44.5 kpc). Contours are at the 0.05 (=1.9 $\;\times\;$ 10²⁰ cm^-2), 0.07, 0.1, ..., 1.12 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f22.eps} } \end{figure}$	Figure 22: NGC 4700 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 21. The contours display the galaxy's systemic velocity of 1404 km s^-1 $\pm$ $(n\times 10)$ km s^-1, ranging from 1344 km s^-1 to 1444 km s^-1.
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f23.eps} } \end{figure}$	Figure 23: NGC 4700 pv diagram along the major axis, covering a radial range of ${\pm } 2\hbox {$.\mkern -4mu^\prime $ }5$ ( $\pm$ 18.6 kpc). Contours show surface brightness levels of -1.8, -0.9, 0.9 (=2.5- $\sigma$ ), 1.8, 3.6, ... 28.8 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=14cm,clip]{1671_f25.eps} } \end{figure}$	Figure 25: NGC 7090 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $8'\times 8'$ (27.5 kpc $\times$ 27.5 kpc). Contours are at the 0.10 (=3.8 $\;\times\;$ 10²⁰ cm^-2), 0.14, 0.2, ..., 1.6 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=8.4cm,clip]{1671_f26.eps} } \end{figure}$	Figure 26: NGC 7090 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 25. The contours display the galaxy's systemic velocity of 849 km s^-1 $\pm$ $(n\times 15)$ km s^-1, ranging from 744 km s^-1 to 924 km s^-1.
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$\begin{figure} \par {\includegraphics[width=8.6cm,clip]{1671_f27.eps} } \end{figure}$	Figure 27: NGC 7090 pv diagram along the major axis, covering a radial range of ${\pm } 4'$ ( $\pm$ 13.6 kpc). Contours show surface brightness levels of -4.0, -2.8, 2.8 (=2.5- $\sigma$ ), 4.0, 5.6, ... 22.4 mJy beam^-1, separated by factors of $\sqrt {2}$ . Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=15cm,clip]{1671_f29.eps} } \end{figure}$	Figure 29: NGC 7462 overlay of HI total intensity map on DSS-2 red optical image. The FOV is $8'\times 6'$ (35.2 kpc $\times$ 26.4 kpc). Contours are at the 0.075 (=2.9 $\;\times\;$ 10²⁰ cm^-2), 0.106, 0.15, ..., 1.68 Jy km s^-1 surface brightness levels, separated by factors of $\sqrt {2}$ .
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f30.eps} } \end{figure}$	Figure 30: NGC 7462 HI velocity field overlaid on HI total intensity image. The FOV is the same as in Fig. 29. The contours display the galaxy's systemic velocity of 1064 km s^-1 $\pm$ $(n\times 20)$ km s^-1, ranging from 984 km s^-1 to 1144 km s^-1.
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{1671_f31.eps} } \end{figure}$	Figure 31: NGC 7462 pv diagram along the major axis, covering a radial range of ${\pm } 3'$ ( $\pm$ 13.2 kpc). Contours show surface brightness levels of -3, -1.5, 1.5 (=2.5- $\sigma$ ), 3, 6, 12, 24 mJy beam^-1, separated by factors of 2. Negative contours are bold.
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$\begin{figure} \par {\includegraphics[width=16.2cm,clip]{1671_f6.ps} } \end{figure}$	Figure 6: The same as Fig. 5, with a reduced field-of-view of $13'\times 6\hbox {$.\mkern -4mu^\prime $ }5$ (66.2 kpc $\times$ 33.1 kpc), zooming in on the galaxies NGC 1511 and NGC 1511b. The crosses mark the positions of the galaxy centres.
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$\begin{figure} \par {\includegraphics[width=17.1cm,clip]{1671_f15.ps} } \end{figure}$	Figure 15: NGC 4565 channel maps with a channel width of 16.5 km s^-1 (continued).
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$\begin{figure} \par {\includegraphics[width=17.9cm,clip]{1671_f20.ps} } \end{figure}$	Figure 20: The same as in Fig. 19, now NGC 4700 only, with a reduced field-of-view of $6'\times 6'$ (44.5 kpc $\times$ 44.5 kpc).
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