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The Disturbed ISM of the Local Group Dwarf Galaxy NGC 6822 | | W.J.G. de Blok
; F. Walter
; | | Date: |
5 Jun 2000 | | Subject: | astro-ph | | Affiliation: | ATNF, Australia Caltech, USA | | Abstract: | We present a wide-field, high spatial and velocity resolution map of the entire extended HI distribution of the nearby Local Group dwarf galaxy NGC 6822. The observations were obtained with the Parkes single-dish telescope and the Australia Telescope Compact Array in mosaicing mode. NGC 6822 has an extended HI-disk which is shaped by the presence of numerous HI holes and shells, including a supergiant shell, and the effects of tidal interaction, in the form of a tidal arm and an infalling or interacting HI complex. These tidal features are not obvious in lower resolution data, and only the proximity of NGC 6822 enables us to see them clearly. This suggests that the importance of minor interactions in dwarf galaxies may be larger than previously assumed. | | Source: | arXiv, astro-ph/0006057 | | Services: | Forum | Review | PDF | Favorites | |
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