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A multi-frequency study of the Wolf-Rayet blue compact dwarf galaxy He2-10

Published online by Cambridge University Press:  25 May 2016

David I. Méndez ,
César Esteban ,
Miroslav D. Filipović ,
Matthias Ehle ,
Prank Haberl  and
Raymond F. Haynes
David I. Méndez
Affiliation:
Institute de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Canary Islands, Spain
César Esteban
Affiliation:
Institute de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Canary Islands, Spain
Miroslav D. Filipović
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Garching, Germany University of Western Sydney, Nepean, NSW 2747, Australia Australia Telescope National Facility, CSIRO, NSW 212, Australia
Matthias Ehle
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Garching, Germany
Prank Haberl
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Garching, Germany
Raymond F. Haynes
Affiliation:
Australia Telescope National Facility, CSIRO, NSW 212, Australia

Abstract

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We present preliminary results on multi-wavelength observations of the Wolf-Rayet Blue Compact Dwarf Galaxy He2–10. These observations include Hα and continuum imaging, high-resolution Hα spectroscopy, high-resolution radio-continuum mapping at 6.3 and 3.5 cm and X-ray mapping. The deep Hα image reveals that the galaxy consists of a complex system of different star-forming knots surrounded by kpc-scale bubble-like and filamentary structures. The most interesting structure is a bipolar superbubble centered on the most intense star-formation knot. High-resolution spectroscopy of this structure indicates that it is expanding with a velocity in the range 75–250 km s−1. This kind of outflows is likely to be produced by the mechanical action of stellar winds and supernovae explosions in the intense starbursts that the galaxy hosts. This scenario is consistent with the finding of a very steep radio spectral index in the extended radio continuum emission (α = −0.59) that confirms the presence of a large number of supernova remnants in the galaxy.

Type
Part 5. Wolf-Rayet stars and other massive stars in starburst galaxies: the case of Wolf-Rayet galaxies (integrated spectra)
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 610 - 611
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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