All Figures

$\begin{figure} \par\includegraphics[width=9.5cm,height=4.5cm,clip]{1200fg01.eps}\includegraphics[width=4.5cm,height=4.5cm,clip]{1200fg02.eps} \end{figure}$ Figure 1: ¹²CO(1-0) ( left), ¹²CO(2-1) ( middle) and model ( right) integrated maps from -45 km s^-1 to -10 km s^-1 ( $V_{\rm LSR}$ ). The axes give the RA and Dec offsets in arcseconds with respect to the phase center ( $\alpha_{\rm J2000}=09^{\rm h} 58^{\rm m} 1\hbox{$\hbox{$.\!\!^{\rm s}$ }$ }7$ and $\delta_{\rm J2000}= 69^{\circ}03'23\hbox{$~.\!\!^{\prime\prime}$ }0$ ) indicated by a cross. The ¹²CO(1-0) contours ( left panel) go from 340 mJy/beam km s^-1 ( $4\sigma$ ) to 1.7 Jy/beam km s^-1 ( $20\sigma$ ) by steps of 170 mJy/beam km s^-1 ( $2\sigma$ ). The ¹²CO(2-1) contours ( central panel) go from 0.8 Jy/beam km s^-1 ( $4\sigma$ ) to 3.2 Jy/beam km s^-1 ( $16\sigma$ ) by steps of 0.4 Jy/beam km s^-1 ( $2\sigma$ ). The segment correponding to the position-velocity diagram of Fig. 3 is shown on the CO(1-0) map. The cone model ( right panel) is discused in Sect. 5.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=14cm,clip]{1200fg03.eps} \end{figure}$ Figure 2: ¹²CO(1-0) velocity-channel maps observed with the IRAM interferometer and the IRAM 30 m antenna for the short spacings. The resolution ( FWHM of the beam) is $3.74\hbox {$^{\prime \prime }$ }\times 3.31\hbox {$^{\prime \prime }$ }$ (PA = $-45.5\deg$ ). Velocity channels range from $V_{\rm LSR}=-40.2$ to -11.6 km s^-1 by steps of 2.6 km s^-1. The phase center is marked by a cross in each map. The contours begin at 27 mJy/beam (i.e. $3\sigma$ ) and are spaced by 18 mJy/beam ( $2\sigma$ ), the highest contour is at 99 mJy/beam ( $11\sigma$ ). The dotted lines represent contours of a cone model, the levels are at 1/30, 4/30 and 7/30 of the maximum of the model data cube (The maximum of individual maps is decreasing when going from -11 to -40 km s^-1 and the higher levels disappear accordingly).
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1200fg04.eps} \end{figure}$ Figure 3: ¹²CO(1-0) position-velocity diagram along the segment drawn in Fig. 1 ( left panel). The right end of the angular offset axis corresponds to the N-W end of the segment.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{aa1200f4_n.eps} \end{figure}$ Figure 4: The ¹³CO(1-0) and ¹²CO(3-2) lines from the molecular complex. The ¹²CO(1-0) line divided by 6 and 2.5, respectively, is overlaid as a dashed line.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.4cm,clip]{1200fg06.eps} \end{figure}$ Figure 5: H $\alpha$ emission (grey scale) from CFHT observations. The thin contours correspond to the low level H $\alpha$ (lowest contour at 3 $\sigma$ with a contour smoothness of 10), the thick contours to the CO(1-0) levels (the lowest at 4 $\sigma$ ). The cross in the shell shows the Chandra position of X-9. MH9/10 is a large supershell (Miller 1995). The MH11 nebula was catalogued as a separate H II region in Miller & Hodge (1994).
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{1200fg07.eps} \end{figure}$ Figure 6: B-band image (grey scale) from CFHT. The thin contours correspond to the low level H $\alpha$ (lowest contour at 3 $\sigma$ ), the thick contours to the CO(1-0) levels (the lowest at 4 $\sigma$ ). The cross in the shell shows the Chandra position of X-9.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{1200fg08.eps} \end{figure}$ Figure 7: R-band image (grey scale) from CFHT. The thin contours correspond to the low level H $\alpha$ (lowest contour at 3 $\sigma$ ), the thick contours to the CO(1-0) levels (the lowest at 4 $\sigma$ ). The cross in the shell shows the Chandra position of X-9.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{1200fg09.eps} \end{figure}$ Figure 8: Observed positions of the CO survey superposed onto a map of H I emission from Yun et al. (1994) ( left) and from Adler & Westpfahl (1996) ( right). The white cross on the right panel shows the position of the complex. The circles represent the beams of the IRAM 30 m (white) and the Kitt Peak telescope (black; large circles 3 mm; small circles 1 mm). The dashed ellipses show the locations of Concentration I and Concentration II.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{1200fg10.ps} \end{figure}$ Figure 9: The H I spectrum (thick line) taken at the position of the complex from the data of Adler & Westpfahl (1996) and spatially smoothed (beamsize: 18''). The CO(1-0) spectrum of the data inside the 4 $\sigma$ level of the integrated map (Fig. 1) is superimposed (thin line). To match the H I flux range, the CO flux was divided by 700.
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{1200fg11.eps} \end{figure}$ Figure 10: Left: H I emission integrated over [-132,239] km s^-1 from Yun et al. (1994) overlaid with contours of the same emission integrated over [-80,0] km s^-1 (white) and [0,80] km s^-1 (black). The levels are respectively (0.15, 0.55, 0.95, 1.35) Jy/beam km s^-1 and (0.1, 0.7, 1.3, 1.9) Jy/beam km s^-1. The crosses show the positions of the molecular complex, Holmberg IX, and the center of M 81. Right: simulations of the interaction of M 81 with M 82 and NGC 3077 from Yun et al. (1993).
Open with DEXTER

In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{1200fg04.eps} \end{figure}$	Figure 3: ¹²CO(1-0) position-velocity diagram along the segment drawn in Fig. 1 ( left panel). The right end of the angular offset axis corresponds to the N-W end of the segment.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{aa1200f4_n.eps} \end{figure}$	Figure 4: The ¹³CO(1-0) and ¹²CO(3-2) lines from the molecular complex. The ¹²CO(1-0) line divided by 6 and 2.5, respectively, is overlaid as a dashed line.
Open with DEXTER

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{1200fg07.eps} \end{figure}$	Figure 6: B-band image (grey scale) from CFHT. The thin contours correspond to the low level H $\alpha$ (lowest contour at 3 $\sigma$ ), the thick contours to the CO(1-0) levels (the lowest at 4 $\sigma$ ). The cross in the shell shows the Chandra position of X-9.
Open with DEXTER

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{1200fg08.eps} \end{figure}$	Figure 7: R-band image (grey scale) from CFHT. The thin contours correspond to the low level H $\alpha$ (lowest contour at 3 $\sigma$ ), the thick contours to the CO(1-0) levels (the lowest at 4 $\sigma$ ). The cross in the shell shows the Chandra position of X-9.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{1200fg10.ps} \end{figure}$	Figure 9: The H I spectrum (thick line) taken at the position of the complex from the data of Adler & Westpfahl (1996) and spatially smoothed (beamsize: 18''). The CO(1-0) spectrum of the data inside the 4 $\sigma$ level of the integrated map (Fig. 1) is superimposed (thin line). To match the H I flux range, the CO flux was divided by 700.
Open with DEXTER