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Chemical Routes to Dust Formation in the Ejecta of Novae

Published online by Cambridge University Press:  12 April 2016

J.M.C. Rawlings  and
D. A. Williams
J.M.C. Rawlings
Affiliation:
Mathematics Department, UMIST, P.O. Box 88, Manchester, M60 1QD, U.K.
D. A. Williams
Affiliation:
Mathematics Department, UMIST, P.O. Box 88, Manchester, M60 1QD, U.K.

Extract

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The chemistry of the formation of nucleation sites in the ejecta of novae has been investigated. Previous authors (e.g. Clayton and Wickramasinghe 1976) have noted that grain growth is rapid once nucleation sites have formed but the assumption is generally made that the ejecta is in LTE during the nucleation phase. This is obviously not the case as the ejecta is illuminated by an intense radiation field so that the lifetimes of the larger species are of the order of one second, even the ejecta kinetic temperature is only 1000-2000 K. We propose that nucleation sites form by heterogeneous chemical reactions in a highly non-equilibrium chemistry.

Type
2. Models of Observations
Information
International Astronomical Union Colloquium , Volume 122: Physics of Classical Novae , 1990 , pp. 295 - 296
Copyright
Copyright © Springer-Verlag 1990

References

Clayton, D.D. and Wickramasinghe, N.C., 1976, Ast.Sp.Sci., 42, 463.Google Scholar
Rawlings, J.M.C., 1986, Mon. Not. R. astr. Soc., 232, 507.CrossRefGoogle Scholar