HI observations of interacting galaxy pair NGC 4038/9

Gordon, Scott, Koribalski, Bärbel and Jones, Keith (2001) HI observations of interacting galaxy pair NGC 4038/9. Monthly Notices of The Royal Astronomical Society, 326 2: 578-596. doi:10.1046/j.1365-8711.2001.04588.x

Author Gordon, Scott
Koribalski, Bärbel
Jones, Keith
Title HI observations of interacting galaxy pair NGC 4038/9
Journal name Monthly Notices of The Royal Astronomical Society
ISSN 0035-8711: 1365-8711: 1365-2966
Publication date 2001-08-11
Sub-type Article (original research)
DOI 10.1046/j.1365-8711.2001.04588.x
Volume 326
Issue 2
Start page 578
End page 596
Total pages 19
Editor A.C. Fabian
Place of publication United Kingdom
Publisher Blackwell Science Ltd
Collection year 2001
Language eng
Subject C1
240101 Astronomy and Astrophysics
780102 Physical sciences
Abstract We present the results of new radio interferometer Hi line observations for the merging galaxy pair NGC 4038/9 ('The Antennae'), obtained using the Australia Telescope Compact Array. The results improve substantially with respect to those of van der Hulst and show in detail the two merging galactic discs and the two tidal tails produced by their interaction. The small edge-on spiral dwarf galaxy ESO 572-G045 is also seen near the tip of the southern tail, but distinct from it. It shows no signs of tidal interaction. The northern tidal tail of the Antennae shows no HI connection to the discs and has an extension towards the west. The southern tidal tail is continuous, with a prominent HI concentration at its tip, roughly at the location of the tidal dwarf galaxy observed optically by Mirabel, Dottori & Lutz. Clear velocity structure is seen along the tidal tails and in the galactic discs. Radio continuum images at 20 and 13 cm are also presented, showing the discs in detail.
Keyword Astronomy & Astrophysics
Radio Continuum
Radio Lines
Young Star-clusters
Spiral Galaxies
Antennae Galaxies
Dwarf Galaxies
Disk Galaxies
Luminosity Function
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Created: Tue, 14 Aug 2007, 16:05:25 EST