Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269..427e&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 2/JUL15, P. 427, 1994
Astronomy and Astrophysics
Astronomy
14
Scientific paper
We consider the origin of the `PAH' emission reported in recent novae. We show that free PAH molecules would not survive in the environment of a nova and that the `PAH' emission is more likely to have arisen in hydrogenated amorphous carbon (HAC) grains, which probably rehydrogenate after the dust has dispersed; we predict the appearance of extended red emission at this time. Furthermore, since the infrared properties of nitrogenated carbon are significantly different from those of hydrogenated carbon in the 6-8 m range and novae are normally overabundant in nitrogen, carbon dust grains originating in novae are likely to be uniquely identifiable as such. Key words: molecular processes - circumstellar matter - novae, cataclysmic variables - dust, extinction - infrared: general - infrared: stars.
Evans Aaron
Rawlings M. C. J.
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