Hostname: page-component-7c8c6479df-p566r Total loading time: 0 Render date: 2024-03-29T04:48:25.073Z Has data issue: false hasContentIssue false

Chemical models of AGB winds

Published online by Cambridge University Press:  25 May 2016

I. Cherchneff*
Affiliation:
Physics Department, UMIST, P.O. Box 88, Manchester W601QD, United Kingdom

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 present chemical models of the inner circumstellar envelope of a typical carbon-rich AGB star. The effect of pulsation-driven shocks on the gas close to the stellar photosphere is considered. The chemistry of dust condensation nuclei formation is described and applied to the gas layers close to the star. We derive formation yields for polycyclic aromatic hydrocarbon (PAH) species and their dimers and discuss their role in the condensation of dust. Models of the chemistry of silicon- and sulfur-bearing molecules in the inner envelope are also presented.

Type
Stars and Circumstellar Envelopes
Copyright
Copyright © Kluwer 1997 

References

Allain, T., Sedlmayr, E., Leach, S. 1996, A&A 305, 616.Google Scholar
Bertschinger, E., Chevalier, R.A. 1985, ApJ 299, 167.Google Scholar
Bowen, G.H. 1988, ApJ 329, 299.Google Scholar
Cherchneff, I., Barker, J.R., Tielens, A.G.G.M. 1991, ApJ 377, 541.Google Scholar
Cherchneff, I., Barker, J.R., Tielens, A.G.G.M. 1993, ApJ 413, 445.Google Scholar
Cherchneff, I., Tielens, A.G.G.M. 1994, in Circumstellar Media in Late Stages of Stellar Evolution, eds. Clegg, R., Stevens, I., Meikle, W.P.S., (Cambridge University Press), p. 232.Google Scholar
Cherchneff, I., Tielens, A.G.G.M. 1996, in preparation.Google Scholar
Danchi, W.C., Bester, M. 1995, Astrophys. Space Sci. 224, 339.Google Scholar
Fahr, A., Mallard, W.G., Stein, S.E. 1988, in Symposium (Int.) on Combustion, 21, The Combustion Institute, Pittsburgh, p. 825.Google Scholar
Fox, M.W., Wood, P.R. 1985, ApJ 297, 455.Google Scholar
Frenklach, M., Feigelson, E.D. 1989, ApJ 341, 372.Google Scholar
Frenklach, M., Wang, H. 1991, in Symposium (Int.) on Combustion, 23, The Combustion Institute, Pittsburgh, p. 1559.Google Scholar
Groenewegen, M.A.T. 1995, A&A 293, 463.Google Scholar
Keady, J.J., Ridgway, S.T. 1993, ApJ 406, 199.Google Scholar
Knapp, G.R. 1985, ApJ 293, 273.Google Scholar
Lihrmann, J.M., Cauchetier, M. 1994, J. of European Ceramic Soc. 13, 41.Google Scholar
Lucas, R. 1995, Astrophys. Space Sci. 224, 380.Google Scholar
Miller, J.H., Mallard, W.G., Smyth, K.C. 1984, J. Phys. Chem. 88, 4963.Google Scholar
Willson, L.A., Bowen, G.H. 1986, in Cool Stars, Stellar Systems, and the Sun, Vol. 254, (Berlin: Springer), p. 385.CrossRefGoogle Scholar
Willacy, K., Cherchneff, I. 1996, in preparation.Google Scholar