Inflow and outflows in the interacting system NGC 2992/3
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Whereas it is well known that gas may be driven into the core of merging disks, fueling a central AGN or a nuclear starburst, recent studies have shown that a significant fraction of the stellar/gaseous components is expelled into the intergalactic medium along tidal tails. The tidal debris might be dispersed in the intergalactic/intracluster medium where it adds to the diffuse background light such as that observed in the Coma cluster, might fall back towards the merger, or regroup to form a new generation of galaxies, the so-called tidal dwarf galaxies (TDGs). We illustrate in this paper these various phenomena with a detailed multi-wavelength study of the interacting system NGC 2992/3 (Arp 245).
Postscript 4 pages, incl. 2 figures: Proceedings of Rencontres de Moriond, 13-20 March 1999, ``Building Galaxies: from the Primordial Universe to the Present'', ed F. Hammer, T. X. Thuan, V. Cayatte, B. Guiderdoni and J. Tran Thanh Van (Ed. Frontieres)
Postscript 4 pages, incl. 2 figures: Proceedings of Rencontres de Moriond, 13-20 March 1999, ``Building Galaxies: from the Primordial Universe to the Present'', ed F. Hammer, T. X. Thuan, V. Cayatte, B. Guiderdoni and J. Tran Thanh Van (Ed. Frontieres)