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VLA HI and OVRO CO Interferometry of a Tidal Dwarf Galaxy

Published online by Cambridge University Press:  26 May 2016

Elias Brinks ,
Pierre-Alain Duc  and
Fabian Walter
Elias Brinks
Affiliation:
INAOE, Apdo. Postal 51 & 216, Puebla, Pue 72000, Mexico
Pierre-Alain Duc
Affiliation:
Service d'Astrophysique, CEA/DSM/DAPNIA, Saclay, F-91191, France
Fabian Walter
Affiliation:
NRAO-AOC, P.O. Box O, Socorro, NM 87801, USA

Abstract

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We present high resolution interferometric observations of the cool atomic and cold molecular ISM of the TDG candidate Arp 245N, an object resembling a dwarf galaxy in the northern tidal tail of the interacting system NGC 2992/3. We observed the HI line with the NRAO VLA and the CO(1→0) transition with the OVRO millimeter interferometer at 5“ – 6” angular resolution (750 pc linear resolution). These datacubes offer the required spatial and velocity resolution to determine whether the mass concentration near the tip of the tail is a genuine feature, and hence a good TDG candidate, or an artefact caused by a fortuitous alignment of our line of sight with the direction of the tail. A preliminary analysis seems to confirm that Arp 245N is a self-gravitating entity.

Type
Part 4. Recycling
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 532 - 537
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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