Up: The Ursa Major cluster

Appendix B: The HI atlas

$\begin{figure} \par\includegraphics[width=10cm,clip]{UMaHImap.ps}\end{figure}$

Figure B.1: Integrated HI maps of all galaxies in the cluster more inclined than 45 degrees and brighter than M(B)=-16.5. The angular resolution is $30\times 30$ arcsec. Contour levels are at column densities of 0.5, 2.0, 3.5 and $5.0\ 10^{21}$ atoms cm^-2. Individual galaxies are four times enlarged. To avoid overlap, some galaxies are slightly displaced from their actual position. N3906, N3938, U6962 and U6930 are more face-on than 45 degrees. U6940 is fainter than the complete sample limit. The dashed circle indicates the adopted boundary of the cluster

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Figure B.2: Same as Fig. B.1, displayed here in grayscale. Note the interacting pairs N3769/1135+48, N3893/N3896 and U6962/U6973. The galaxies N3718, N3726, N4010, N4013, N4088 and N4138 are strongly warped. It is clear that the integrated column density strongly depends on inclination. Many of the more face-on galaxies show a depletion of the HI gas in their inner regions

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Up: The Ursa Major cluster

Copyright ESO 2001