Fig. 4

HI 21-cm brightness temperature maps of six subsequent velocity channels. HRK 81.4-77.8 is located in the very center of the map. Note, that bright HI emission is detected across the whole field of interest, comparable in both, the brightness as well as in line width. HRK 81.4-77.8 is hence part of a much larger extended HI structure. Remarkable is the gas motion from top-left to HRK 81.4-77.8 in the very center in hand with the formation of a ring-like structure encircling HRK 81.4-77.8.
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