Spectrophotometric Investigation of a Sample of Tidal Dwarf Galaxies

Details Spectrophotometric Investigation of a Sample of Tidal Dwarf Galaxies Spectrophotometric Investigation of a Sample of Tidal Dwarf Galaxies

2001-05-16

arxiv.org/abs/astro-ph/0105275v1

Astronomy and Astrophysics

Astrophysics

To be published in: ``Dwarf Galaxies and their Environment'', eds. K.S. de Boer, R.-J. Dettmar, U. Klein

Scientific paper

We define a Tidal Dwarf Galaxy (TDG) as a self-gravitating entity of dwarf-galaxy mass built from tidal material expelled during interactions. We then summarize our findings on broad-band imaging and spectroscopy of a sample of TDG candidates in a sequence of interacting systems. Evidence for decoupled kinematics in the ionized gas have been found in several objects. This could indicate that they are bound galaxies and therefore genuine TDGs. As a detailed example we analyze the system AM 1159-530, where surprisingly high velocity gradients have been measured.

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