Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.347.1294p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 347, Issue 4, pp. 1294-1303.
Astronomy and Astrophysics
Astronomy
7
Novae, Cataclysmic Variables, Ism: Jets And Outflows, Ism: Molecules, Infrared: Stars
Scientific paper
The chemistry of the early stages of the evolution of a nova wind is examined. The new models include an extended chemistry and, in the light of current model atmosphere calculations, a careful treatment of the photoreactions. The results indicate that the chemistry may be somewhat richer than previously determined and, contrary to the findings of previous studies, is essentially not photon-dominated. The abundance of species such as CN and CO match observations well and the ratio of their abundances may be a useful density diagnostic. However, except at very early times, CO formation does not saturate; this has important implications for the subsequent dust-formation epoch. In particular it provides theoretical backing for those observations which suggest that carbon-rich and silicate dusts can be formed concurrently.
Pontefract Matthew
Rawlings M. C. J.
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