VLA HI and OVRO CO Interferometry of a Tidal Dwarf Galaxy

Details VLA HI and OVRO CO Interferometry of a Tidal Dwarf Galaxy VLA HI and OVRO CO Interferometry of a Tidal Dwarf Galaxy

2004-02-12

arxiv.org/abs/astro-ph/0402274v1

Astronomy and Astrophysics

Astrophysics

6 pages 3 figures, to be published in: Proceedings of IAU Symposium 217: Recycling Intergalactic and Interstellar Matter (eds.

Scientific paper

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.

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