Astrophysics and Space Science

, Volume 224, Issue 1–2, pp 495–496 | Cite as

Extended dust shells around carbon stars resolved by “HIRAS”

  • H. Izumiura
  • D. J. M. Kester
  • T. De Jong
  • C. Loup
  • L. B. F. M. Waters
  • Tj. R. Bontekoe
Poster Contributions

Abstract

We have examined forty-two carbon stars which show excess emission at 60 and/or 100µm by applying maximum-entropy image reconstruction techniques to the IRAS 60µm survey data. Thirteen stars are found to be extended in the reconstructed images. Four of them show a detached ring centered on the stellar position. In particular, U Ant may have a double detached dust shell. The implications of our results are discussed concerning the variation of mass loss on the AGB evolution.

Key words

HIRAS carbon stars dust shells thermal pulses 

References

  1. Bontekoe, Tj. R., Koper, E., & Kester, D. J. M.: 1994,A&A 284, 1037Google Scholar
  2. Olofsson, H., Carlström, U., Eriksson, K., Gustafsson, B., & Willson, L.A.: 1990,A&A 230, L13Google Scholar
  3. Vassiliadis, E. & Wood, P. R.: 1993,ApJ 413, 641Google Scholar
  4. Waters, L.B.F.M., Loup, C., Kester, D. J. M., Bontekoe, Tj., R., & de Jong, T.: 1994,A&A 281, L1Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • H. Izumiura
    • 1
  • D. J. M. Kester
    • 1
  • T. De Jong
    • 1
  • C. Loup
    • 2
  • L. B. F. M. Waters
    • 3
  • Tj. R. Bontekoe
    • 4
  1. 1.SRON Laboratory for Space Research Groningen Landleven 12The Netherlands
  2. 2.Institut d'Astrophysique de ParisFrance
  3. 3.Astronomical Institute Anton PannekoekUniversity of AmsterdamThe Netherlands
  4. 4.Bontekoe Data ConsultancyThe Netherlands

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