ATCA HI observations of the peculiar galaxy IC 2554

Koribalski, B., Gordon, S. and Jones, K. (2003) ATCA HI observations of the peculiar galaxy IC 2554. Monthly Notices of The Royal Astronomical Society, 339 4: 1203-1222. doi:10.1046/j.1365-8711.2003.06277.x


Author Koribalski, B.
Gordon, S.
Jones, K.
Title ATCA HI observations of the peculiar galaxy IC 2554
Journal name Monthly Notices of The Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
1365-2966
Publication date 2003
Sub-type Article (original research)
DOI 10.1046/j.1365-8711.2003.06277.x
Open Access Status DOI
Volume 339
Issue 4
Start page 1203
End page 1222
Total pages 20
Editor A C Fabian
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2003
Language eng
Abstract ATCA H I and radio continuum observations of the peculiar southern galaxy IC 2554 and its surroundings reveal typical signatures of an interacting galaxy group. We detected a large H I cloud between IC 2554 and the elliptical galaxy NGC 3136B. The gas dynamics in IC 2554 itself, which is sometimes described as a colliding pair, are surprisingly regular, whereas NGC 3136B was not detected. The H I cloud, which emerges from IC 2554 as a large arc-shaped plume, has a size of similar to30 kpc, larger than that of IC 2554. The total H I mass of the IC 2554 system is similar to2 x 10(9) M., one-third of which resides in the H I cloud. It is possible that tidal interaction between IC 2554 and NGC 3136B caused this spectacular H I cloud, but the possibility of IC 2554 being a merger remnant is also discussed. We also detected H I gas in the nearby galaxies ESO 092-G009 and RKK 1959 and an associated H I cloud, ATCA J1006-6710. Together they have an H I mass of similar to4.6 x 10(8) M-.. Another new H I source, ATCA J1007-6659, with an H I mass of only similar to2.2 x 10(7) M. was detected roughly between IC 2554 and ESO 092-G009 and corresponds to a face-on low surface brightness dwarf galaxy. Star formation is evident only in the galaxy IC 2554 with a rate of similar to4 M. yr(-1).
Keyword Astronomy & Astrophysics
Galaxies
Southern Milky-way
Large-scale Structures
Velocity Dispersions
Dwarf Galaxies
Tidal Tails
Extension
Catalog
Merger
Emission
Saao
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2004 Higher Education Research Data Collection
School of Physical Sciences Publications
 
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Created: Wed, 15 Aug 2007, 01:58:24 EST