An Extragalactic H1 Cloud with No Optical Counterpart?
Kilborn, Virginia A; Staveley-Smith, Lister; Marquarding, M; Webster, Rachel L; Malin, David; Banks, G D; Bhathal, R; de Blok, W J G; Boyce, Peter; Disney, Mike J; Drinkwater, Michael John; Ekert, Paul; Freeman, Kenneth; Gibson, Bradley K; Henning, P A; Jerjen, Helmut; Knezek, Patricia M; Koribalski, Baerbel S; Minchin, R F; Mould, Jeremy; Oosterloo, T; Price, R N; Putman, Mary E; Ryder, Stuart; Sadler, Elaine M; Stewart, Ian M; Stootman, F; Wright, A E
We report the discovery, from the H I Parkes All-Sky Survey (HIPASS), of an isolated cloud of neutral hydrogen, which we believe to be extragalactic. The H I mass of the cloud (HIPASS J1712-64) is very low, 1.7 × 107 M⊙, using an estimated distance of
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