Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-17T14:35:58.951Z Has data issue: false hasContentIssue false
  • English
  • Français

Extended Dust Shells Surrounding AGB Stars Revealed with ISO

Published online by Cambridge University Press:  25 May 2016

H. Izumiura  and
O. Hashimoto
H. Izumiura
Affiliation:
Okayama Astrophysical Observatory, NAOJ, Kamogata, Asakuchi, Okayama 719-0232, JAPAN
O. Hashimoto
Affiliation:
Gunma Astronomical Observatory 1-18-7 Ohotomo, Maebashi, Gunma 371-0847, JAPAN

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We obtained high resolution far-infrared images of the circumstellar dust shells of several AGB carbon stars using ISOPHOT on board the ISO. We used the C-100 and C-200 detector arrays in PHT32 oversampling mode at 90 μm and 160 μm except for U Ant, which was observed at 60 μm and 90 μm. AFGL 3068 is very compact in both bands. R Scl is marginally resolved at 90 μm. U Ant shows a double shell structure, a compact but well resolved shell surrounded by a very extended envelope. Y CVn exhibits a very extended, hollow dust shell. We analyse the structure of the dust shells using a simple dust shell model and discuss the mass-loss behaviors, particularly in conjunction with the thermal pulses on the AGB.

Type
Part 4. Circumstellar Envelopes
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 401 - 406
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

ESA, 1997, The HIPPARCOS Catalogue, ESA SP-1200 Google Scholar
Gabriel, C., Acosta-Pulido, J., Heinrichsen, I., Skaley, D., Morris, H., Tai, W.-M., 1997, in Astronomical Data Analysis Software and Systems VI, eds. Hunt, G. & Payne, H.E., ASP Conf. Ser. 125, p. 108 Google Scholar
Groenewegen, M.A.T., de Jong, T., van der Bliek, N.S., Slijkhuis, S., Willems, F.J., 1992, A&A 253, 150 Google Scholar
Hashimoto, O., Izumiura, H., 1997, Ap&SS 251, 207 Google Scholar
Izumiura, H., Hashimoto, O., Kawara, K., Yamamura, I., Waters, L.B.F.M., 1996, A&A 315, L221 Google Scholar
Izumiura, H., Waters, L.B.F.M., de Jong, T., Loup, C., Bontekoe, Tj.R., Kester, D.J.M., 1997, A&A 323, 449 Google Scholar
Izumiura, H., Waters, L.B.F.M., de Jong, T., Loup, C., Hashimoto, O., 1998, in The Carbon Star Phenomena, ed. Wing, R., IAU Symposium 177, in press Google Scholar
Kessler, M.F., Steinz, J.A., Anderegg, M.E., et al., 1996, A&A 315, L27 Google Scholar
Klaas, U., Krüger, H., Heinrichsen, I., Heske, A., Laureijs, R., (eds), 1994, ISOPHOT Observer's Manual, version 3.1 Google Scholar
Lemke, D., Klaas, U., Abolins, J., et al., 1996, A&A 315, L64 Google Scholar
Olofsson, H., Bergman, P., Eriksson, K., Gustafsson, B., 1996, A&A 311, 587 Google Scholar
van der Veen, W.E.C.J., Habing, H.J., 1988, A&A 194, 125 Google Scholar
Waters, L.B.F.M., Loup, C., Kester, D.J.M., Bontekoe, Tj.R., de Jong, T., 1994, A&A 281, L1 Google Scholar