``Tidal Dwarf Galaxies: New from Old''

Abstract:

Close interactions and mergers between galaxies, of which at least one
is a gas rich object, produce magnificent tidal tails and bridges. It
has been conclusively shown that within those tails, often at their
tips, tidal material collects and condenses. Surprisingly, the
conditions are such that star formation can commence. There are
several beautiful examples of tidal features which resemble dwarf
galaxies but which have been assembled from tidal material. Some of
them might become self-gravitating entities. In this talk I will
review what is known about Tidal Dwarf Galaxies, show recent HI and
CO observations of several examples, and will speculate about their
fate, their role in the recycling of intergalactic material, and their
cosmological relevance.

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