Hipass detection of an intergalactic gas cloud in the NGC 2442 group

Ryder, S. D., Koribalski, B., Staveley-Smith, L., Kilborn, V. A., Malin, D. F., Banks, G. D., Barnes, D. G., Bhatal, R., de Blok, W. J. G., Boyce, P. J., Disney, M. J., Drinkwater, M. J., Ekers, R. D., Freeman, K. C. and Gibson, B. K. (2001) Hipass detection of an intergalactic gas cloud in the NGC 2442 group. Astrophysical Journal, 555 1: 232-239. doi:10.1086/321453

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Author Ryder, S. D.
Koribalski, B.
Staveley-Smith, L.
Kilborn, V. A.
Malin, D. F.
Banks, G. D.
Barnes, D. G.
Bhatal, R.
de Blok, W. J. G.
Boyce, P. J.
Disney, M. J.
Drinkwater, M. J.
Ekers, R. D.
Freeman, K. C.
Gibson, B. K.
Title Hipass detection of an intergalactic gas cloud in the NGC 2442 group
Journal name Astrophysical Journal   Check publisher's open access policy
ISSN 0004-637X
1538-4357
Publication date 2001
Sub-type Article (original research)
DOI 10.1086/321453
Open Access Status File (Publisher version)
Volume 555
Issue 1
Start page 232
End page 239
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Institute of Physics Publishing
Language eng
Formatted 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 similar to~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 HIPASS data for yielding new clues to the nature of some of the best-known galaxies in the local universe.
Keyword Astronomy & Astrophysics
Galaxies
Galaxies
Galaxies
Radio Lines
Southern Spiral Galaxies
Neutral Hydrogen
H-i
Intracluster Medium
M96 Group
Ngc-2442
Cluster
Discovery
Sequence
Ring
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Authors of this document: Ryder, SD; Koribalski, B; Staveley-Smith, L; Kilborn, VA; Malin, DF; Banks, GD; Barnes, DG; Bhatal, R; de Blok, WJG; Boyce, PJ; Disney, MJ; Drinkwater, MJ; Ekers, RD; Freeman, KC; Gibson, BK; Henning, PA; Jerjen, H; Knezek, PM; Marquarding, M; Minchin, RF; Mould, JR; Oosterloo, T; Price, RM; Putman, ME; Sadler, EM; Stewart, I; Stootman, F; Webster, RL; Wright, AE.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Mon, 13 Aug 2007, 12:26:09 EST