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Stellar Populations of a Sample of Tidal Dwarf Galaxies

Published online by Cambridge University Press:  26 May 2016

Peter M. Weilbacher ,
Uta Fritze-V. Alvensleben  and
Pierre-Alain Duc
Peter M. Weilbacher
Affiliation:
Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK
Uta Fritze-V. Alvensleben
Affiliation:
Universitäts-Sternwarte Göttingen, Geismarlandstr. 11, D-37083 Göttingen, Germany
Pierre-Alain Duc
Affiliation:
CNRS FRE 2591 and CEA, DSM, DAPNIA, Service d'Astrophysique, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette Cedex, France

Abstract

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We investigate the stellar populations of a sample of Tidal Dwarf Galaxies, combining observations and evolutionary synthesis models to try and reveal their formation mechanism. on optical images we select a first sample of TDGs for which optical spectroscopy is used to measure metallicities and velocity structure. Finally, we estimate ages, burst strengths, and stellar masses from near-infrared imaging in comparison with a dedicated grid of evolutionary synthesis models, to assess if Tidal Dwarfs are formed out of collapsing gas clouds or by an accumulation of old stars from the parent galaxy or by a combination of both.

Type
Part 4. Recycling
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 540 - 545
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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