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HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group | | S. D. Ryder
; B. Koribalski
; L. Staveley-Smith
; V. Kilborn
; D. Malin
; G. Banks
; D. Barnes
; R. Bhatal
; W. de Blok
; P. Boyce
; M. Disney
; M. Drinkwater
; R. Ekers
; K. Freeman
; B. Gibson
; P. Henning
; H. Jerjen
; P. Knezek
; M. Marquarding
; R. Minchin
; J. Mould
; T. Oosterloo
; R. Price
; M. Putman
; E. Sadler
; I. Stewart
; F. Stootman
; R. Webster
; A. Wright
; | | Date: |
6 Mar 2001 | | Subject: | astro-ph | | Abstract: | We report the discovery, from the HI 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 HI, 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 with its stream-like 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 which 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. | | Source: | arXiv, astro-ph/0103099 | | Other source: | [GID 445864] astro-ph/0103099 | | Services: | Forum | Review | PDF | Favorites | |
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