NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-24 T02:23:43 PDT
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For refcode 2001ApJ...555..232R:
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2001ApJ...555..232R HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group S. D. Ryder, B. Koribalski, L. Staveley-Smith, V. A. Kilborn, D. F. Malin, G. D. Banks, D. G. Barnes, R. Bhatal, W. J. G. de Blok, P. J. Boyce, M. J. Disney, M. J. Drinkwater, R. D. Ekers, K. C. Freeman, B. K. Gibson, P. A. Henning, H. Jerjen, P. M. Knezek, M. Marquarding, R. F. Minchin, J. R. Mould, T. Oosterloo, R. M. Price, M. E. Putman, E. M. Sadler, I. Stewart, F. Stootman, R. L. Webster, and A. E. Wright Received 2001 January 11; accepted 2001 March 5 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 ~10^9^ M_sun_ 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. Subject headings: galaxies: individual (NGC 2442)-galaxies: interactions- galaxies: intergalactic medium-radio lines: galaxies
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