Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.6104h&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #61.04; Bulletin of the American Astronomical Society, Vol. 26, p.961
Astronomy and Astrophysics
Astronomy
Scientific paper
Tidal forces extract material from interacting galaxies and form bridges and tails of gas and stars. Recent observational results support the idea, presented by Zwicky (1956) and confirmed by N-body simulations (Barnes and Hernquist 1992), that self-gravitating objects within such tidal debris could evolve into small galaxies. For example, Mirabel et al. (1991) observed a region of active star formation at the tip of the southern tail of the Superantennae, and Mirabel et al. (1992) observed a nascent dwarf irregular galaxy at the tip of the Antennae. We present moderately deep CCD images of 52 Hickson compact groups and results from a search for condensed objects in tidal tails within these groups. Tidal tails are expected in compact groups because the number density of galaxies is similar to that of rich clusters, where interactions are common. However, because the groups were not chosen due to the presence of tidal tails, this work presents an unbiased study of dwarf galaxy formation in tidal tails within an environment where such tails should be common. The results to date are presented here. Barnes, J.E. & Hernquist, L.E. 1992, Nature, 360, 715 Mirabel, I.F., Dottori, H. & Lutz, D. 1992, A&A, 256, L19 Mirabel, I.F., Lutz, D. & Maza, J. 1991, A&A, 243, 367 Zwicky, F. 1956, Ergebnisse der Exakten Naturwissenschaften, 29, 344
Charlton Jane C.
Hunsberger Sally D.
Zaritsky Dennis
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