Hostname: page-component-6bf8c574d5-gr6zb Total loading time: 0 Render date: 2025-02-21T06:51:56.982Z Has data issue: false hasContentIssue false
  • English
  • Français

Silicate and ice emission bands in the ISO spectrum of the PAH-emitting carbon-rich planetary nebula CPD-56°8032

Published online by Cambridge University Press:  25 May 2016

Martin Cohen ,
M. J. Barlow ,
R. J. Sylvester ,
X.-W. Liu ,
P. Cox ,
T. Lim ,
B. Schmitt  and
A. K. Speck
Martin Cohen
Affiliation:
Radio Astronomy Laboratory, University of California, Berkeley, CA 94720, U.S.A.
M. J. Barlow
Affiliation:
Dept. of Physics and Astronomy, University College London, London WC1E 6BT, U.K.
R. J. Sylvester
Affiliation:
Dept. of Physics and Astronomy, University College London, London WC1E 6BT, U.K.
X.-W. Liu
Affiliation:
Dept. of Physics and Astronomy, University College London, London WC1E 6BT, U.K.
P. Cox
Affiliation:
Institut d'Astrophysique Spatiale, Université de Paris XI, F-91405 Orsay Cedex, France
T. Lim
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon 0X11 0QX, UK
B. Schmitt
Affiliation:
Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, F–S8041 Grenoble/Saint Martin d'Hères, France
A. K. Speck
Affiliation:
Dept. of Physics and Astronomy, University College London, London WC1E 6BT, U.K.

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.

Combined ISO SWS and LWS spectroscopy is presented of the late WC-type planetary nebula nucleus CPD-56†8032 and its carbon-rich nebula. The extremely broad coverage (2.4–197 μm) enables us to recognize the clear and simultaneous presence of emission features from both oxygen- and carbon-rich circumstellar materials. Removing a smooth continuum highlights bright emission bands characteristic of polycyclic aromatic hydrocarbons (hereafter PAHs) in the 3–15 μm region, bands from crystalline silicates longwards of 18 μm, and the 43- and 62-μm bands of crystalline water ice. We discuss the probable evolutionary state and history of this unusual object in terms of (a) a recent transition from an O-rich to a C-rich outflow following a helium shell flash; or (b) a carbon-rich nebular outflow encountering an O-rich comet cloud orbiting in a Kuiper-belt-like distribution.

Type
Part 3. Formation, Composition, and Processing of Dust
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 291 - 296
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Aitken, D.K., Barlow, M.J., Roche, P.F., Spenser, P.M., 1980, MNRAS 192, 679 Google Scholar
Barlow, M.J., 1998, in ISO's View on Stellar Evolution, eds. Waters, L.B.F.M., Waelkens, C., van der Hucht, K.A. & Zaal, P.A., Kluwer, Dordrecht, Ap&SS 255, 315 Google Scholar
Boothroyd, A.I., Sackmann, I.-J., 1988, ApJ 328, 653 Google Scholar
Clegg, P.E., et al., 1996, A&A 315, L38 Google Scholar
Cohen, M., Barlow, M.J., 1980, ApJ 238, 585 Google Scholar
Cohen, M., Barlow, M.J., Kuhi, L.V., 1975, A&A 40, 291 Google Scholar
Cohen, M., Tielens, A.G.G.M., Allamandola, L.J., 1985, ApJ 299, L93 CrossRefGoogle Scholar
Cohen, M., et al., 1989, ApJ 341, 246 Google Scholar
Cohen, M., Walker, R.G., Witteborn, F.C., 1992, AJ 104, 2030 Google Scholar
Crovisier, J., et al., 1997, Science 275, 1904 CrossRefGoogle Scholar
de Graauw, Th., et al., 1996, A&A 315, L49 Google Scholar
De Marco, O., Barlow, M.J., Storey, P.J., 1997, MNRAS 292, 86 (DMBS) Google Scholar
Glaccum, W., 1990, Ph.D. dissertation, Univ. of Chicago Google Scholar
Koike, C., Shibai, H., Tuchiyama, A., 1993, MNRAS 264, 654 CrossRefGoogle Scholar
Menzies, J.W., Wolstencroft, R.D., 1990, MNRAS 247, 177 Google Scholar
Omont, A., et al., 1990, ApJ 355, L27 Google Scholar
Payne, H.E., Phillips, J.A., Terzian, Y., 1988, ApJ 326, 368 CrossRefGoogle Scholar
Roche, P.F., Aitken, D.K., 1986, MNRAS 221, 63 CrossRefGoogle Scholar
Roche, P.F., Allen, D.A., Bailey, J.A., 1986, MNRAS 220, 7P Google Scholar
Schmitt, B., Quirico, E., Trotta, F., Grundy, W.M., 1998, in Solar System Ices, Schmitt, B., de Bergh, C. & Festou, M. (eds.), Kluwer, Dordrecht, Astrophys. Space Sci. Lib. 227, 199 CrossRefGoogle Scholar
Swinyard, B.M., et al., 1996, A&A 315, L43 Google Scholar
Trotta, F., 1996, Ph.D thesis, Univ. of Grenoble, France Google Scholar
Waters, L.B.F.M., et al., 1996, A&A 315, L361 Google Scholar
Waters, L.B.F.M., et al., 1998a, A&A 331, L61 Google Scholar
Waters, L.B.F.M., et al., 1998b, Nature 391, 868 Google Scholar
Webster, B.L., Glass, I.S., 1974, MNRAS 166, 491 Google Scholar
Weissman, P.R., 1995, ARA&A 33, 327 Google Scholar
Zijlstra, A.A., Gaylard, M.J., te Lintel Hekkert, P., Menzies, J., Nyman, L.-Å., Schwarz, H.E., 1991, A&A 243, L9 Google Scholar