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Dwarf-dwarf interactions: a common origin for dwarf Wolf-Rayet galaxies

Published online by Cambridge University Press:  25 May 2016

César Esteban  and
David I. Méndez
César Esteban
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Canary Islands, Spain
David I. Méndez
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Canary Islands, Spain

Abstract

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We present some results of an observational programme devoted to obtain deep imagery and high-resolution spectroscopy for a sample of dwarf Wolf-Rayet galaxies. Our main result is that interaction with fainter optical companions could be the origin of the strong star formation episodes observed in, at least, an important fraction of the objects. In all the cases presented, the companions and the signatures of interaction or merging can only be detected when deep and detailed observations are taken. We predict that the fraction of dwarf WR galaxies (or even H II galaxies in general) with interacting signatures will increase when detailed observations for more objects are available.

Type
Part 6. Starbursts in normal and active galaxies: their effects on the ISM and on chemical evolution
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 662 - 669
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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