Journal article
HIPASS detection of an intergalactic gas cloud in the NGC 2442 group
SD Ryder, B Koribalski, L Staveley-Smith, VA Kilborn, DF Malin, GD Banks, DG Barnes, R Bhatal, WJG De Blok, PJ Boyce, MJ Disney, MJ Drinkwater, RD Ekers, KC Freeman, BK Gibson, PA Henning, H Jerjen, PM Knezek, M Marquarding, RF Minchin Show all
Astrophysical Journal | UNIV CHICAGO PRESS | Published : 2001
DOI: 10.1086/321453
Abstract
We report the discovery from the H I Parkes All-Sky Survey (HIPASS) of a gas cloud associated with the asymmetric spiral galaxy NGC 2442. This object, designated HIPASS J0731-69, contains ∼109 M⊙ of H I, or nearly one-third as much atomic gas as NGC 2442 itself. No optical counterpart to any part of HIPASS J0731-69 has yet been identified, consistent with the gas being diffuse and its streamlike kinematics. If the gas in HIPASS J0731-69 was once part of NGC 2442, then it was most likely a fairly recent tidal encounter with a moderately massive companion that tore it loose, although the possibility of ram-pressure stripping cannot be ruled out. This discovery highlights the potential of the H..
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