In 1829 WALLABY hydrogen detections, 315 are low surface brightness galaxies and 55 have no optical counterpart; after reliability vetting, 25 isolated dark sources remain as dark galaxy candidates.
Note, HIis detected on the other side of the galaxy, so this dark tidal cloud candidate may be part of a larger structure such as an outflow or polar ring
1 Pith paper cite this work. Polarity classification is still indexing.
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WALLABY pilot survey: properties of HI-selected dark sources and low surface brightness galaxies
In 1829 WALLABY hydrogen detections, 315 are low surface brightness galaxies and 55 have no optical counterpart; after reliability vetting, 25 isolated dark sources remain as dark galaxy candidates.