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WR stars in the LMC

from Part two - Wolf-Rayet Ring Nebulae

Published online by Cambridge University Press:  07 September 2010

By
Tatiana A. Lozinskaya ,
Michael A. Dopita  and
You-Hua Chu
Edited by
R. E. S. Clegg ,
I. R. Stevens  and
W. P. S. Meikle
Tatiana A. Lozinskaya
Affiliation:
Sternberg Astronomical Institute, Moscow Lomonosov University, Russia
Michael A. Dopita
Affiliation:
Mt. Stromlo and Siding Spring Observatories, The Australian National University, Australia
You-Hua Chu
Affiliation:
Department of Astronomy, University of Illinois at Urbana-Champaign, USA
R. E. S. Clegg
Affiliation:
Royal Greenwich Observatory, Cambridge
I. R. Stevens
Affiliation:
Imperial College of Science, Technology and Medicine, London
W. P. S. Meikle
Affiliation:
University of Birmingham
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Summary

In order to understand the evolution of Wolf-Rayet (WR) stars and their interaction with the surrounding circumstellar and interstellar gas we have undertaken an emission-line imaging survey of the (almost complete) WR star population in the Magellanic Clouds (Dopita. et al. 1994).

Interference filter CCD images have been obtained in Hα and [O iii] λ5007 for all WR stars in the LMC and the SMC. The survey was conducted using the 2.3 m telescope at the Siding Spring Observatory ANU. The field of view was 6′.7, and the pixel size was 0″.65/pix.

A total of 115 WR. stars in the LMC (Breysacher 1981; Lortet, 1991) and 9 WR stars in the SMC (Azzopardi & Breysacher, 1979; Morgan et al. 1991) were observed in this survey.

This survey is the first complete survey of the ionized material around WR stars in the Magellanic Clouds, and indeed is the first complete survey in any galaxy. We have almost doubled the number of ring nebula known in the MCs, and have revealed a number of cases in which stellar ejecta has almost certainly been identified. As a consequence, we find that the incidence of ring nebulae around WR stars in the LMC is very similar to that in the solar neighborhood. (According to Lozinskaya, 1982; 1983; 1992 only 30-40% of WR. and Of stars in the distance-complete sample in the Galaxy are associated with ring nebulae; the nebula types of stellar ejecta and wind-blown bubble are even more scarce, about. 10–15%.

Type
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Information
Circumstellar Media in Late Stages of Stellar Evolution , pp. 73 - 77
Publisher: Cambridge University Press
Print publication year: 1994

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  • WR stars in the LMC
    • By Tatiana A. Lozinskaya, Sternberg Astronomical Institute, Moscow Lomonosov University, Russia, Michael A. Dopita, Mt. Stromlo and Siding Spring Observatories, The Australian National University, Australia, You-Hua Chu, Department of Astronomy, University of Illinois at Urbana-Champaign, USA
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.010
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  • WR stars in the LMC
    • By Tatiana A. Lozinskaya, Sternberg Astronomical Institute, Moscow Lomonosov University, Russia, Michael A. Dopita, Mt. Stromlo and Siding Spring Observatories, The Australian National University, Australia, You-Hua Chu, Department of Astronomy, University of Illinois at Urbana-Champaign, USA
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.010
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • WR stars in the LMC
    • By Tatiana A. Lozinskaya, Sternberg Astronomical Institute, Moscow Lomonosov University, Russia, Michael A. Dopita, Mt. Stromlo and Siding Spring Observatories, The Australian National University, Australia, You-Hua Chu, Department of Astronomy, University of Illinois at Urbana-Champaign, USA
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.010
Available formats
×