All Figures

$\begin{figure} \par\includegraphics[width=7cm,clip]{7883fig1.eps} \end{figure}$ Figure 1: The field of our observations (white box, 40 arcsec in size) superposed on a GALEX composite image of M 81. In the figure, FUV is in the blue channel and NUV the yellow one.
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In the text

$\begin{figure} \par\includegraphics[height=16cm,angle=-90,clip]{7883fig2.eps}\par\includegraphics[height=16cm,angle=-90,clip]{7883fig3.eps}\end{figure}$ Figure 2: Map of the observed M 81 central region. Each spectrum has a velocity scale from -600 to 600 km s^-1, and a temperature scale from -20to 70 mK. The positions are offsets relative to the M 81 nucleus assumed of coordinates RA $_{\rm J2000.0} = 09^{\rm h}$ $55^{\rm m}$ $33^{\rm s}$ , Dec $_{\rm J2000.0}$ = 69 $^{\circ }$ 03 $^{\prime }$ 55 $^{\prime \prime }$ . Upper panel: observations of the ¹²CO(1-0) line. Bottom panel: observations of the ¹²CO(2-1) line convolved to the ¹²CO(1-0) beam resolution ( $22^{\prime \prime }$ ).
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In the text

$\begin{figure} \par\includegraphics[width=9cm,clip]{7883fig4.eps}\end{figure}$ Figure 3: Integrated ¹²CO(1-0) emission. The contour levels are between 0.701 to 7.01 K km s^-1 in steps of 0.701 K km s^-1. The beam of $22^{\prime \prime }$ is indicated at the bottom left.
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In the text

$\begin{figure} \par\includegraphics[height=17cm,angle=-90,clip]{7883fig5.eps}\end{figure}$ Figure 4: ¹²CO(2-1) map of the M 81 central region observed with the HERA receiver. Each spectrum has a velocity scale from -600 to 600 km s^-1 and a temperature scale from -20to 70 mK. The positions are offsets relative to the M 81 nucleus assumed of coordinates RA $_{\rm J2000.0}$ = 09 $^{\rm h}$ 55 $^{\rm m}$ 33 $^{\rm s}$ , Dec $_{\rm J2000.0} = 69^{\circ }$ 03 $^{\prime }$ 55 $^{\prime \prime }$ .
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{7883fig6.eps} \end{figure}$ Figure 5: Integrated ¹²CO(2-1) emission. The contour levels are between 0.410 to 4.10 K km s^-1 in steps of 0.410 K km s^-1. The beam of $12^{\prime \prime }$ is indicated at the bottom left.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{7883fig7.eps} \end{figure}$ Figure 6: Integrated ¹²CO(2-1) emission detected with the HERA receiver superposed on the ¹²CO(2-1) emission found with A and B receivers. The contour levels are the same as shown in Fig. 5 between 0.410 to 4.10 K km s^-1 in steps of 0.410 K km s^-1 and the intensity levels detected with A and B receivers are in grey scale. The beam of $12^{\prime \prime }$ is indicated at the bottom left. The intensity peaks detected with the two observing configurations agree quite well between them.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{7883fig1.eps} \end{figure}$	Figure 1: The field of our observations (white box, 40 arcsec in size) superposed on a GALEX composite image of M 81. In the figure, FUV is in the blue channel and NUV the yellow one.
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$\begin{figure} \par\includegraphics[width=9cm,clip]{7883fig4.eps}\end{figure}$	Figure 3: Integrated ¹²CO(1-0) emission. The contour levels are between 0.701 to 7.01 K km s^-1 in steps of 0.701 K km s^-1. The beam of $22^{\prime \prime }$ is indicated at the bottom left.
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{7883fig6.eps} \end{figure}$	Figure 5: Integrated ¹²CO(2-1) emission. The contour levels are between 0.410 to 4.10 K km s^-1 in steps of 0.410 K km s^-1. The beam of $12^{\prime \prime }$ is indicated at the bottom left.
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