Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..175b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 200, July 1982, p. 175-181. Research supported by the Science and Engin
Astronomy and Astrophysics
Astronomy
14
Infrared Radiation, Novae, Stellar Envelopes, Stellar Luminosity, Stellar Mass Ejection, Stellar Temperature, Black Body Radiation, Graphite, Photosphere, Temperature Effects
Scientific paper
In order to explain why fast novae appear unable to produce extensive dust shells, the rapid condensation of graphite grains from the ejecta of classical novae is considered. By considering temperature change effects in the underlying pseudophotosphere of classical novae on grain absorption efficiencies, the time at which grain growth can begin is derived. Because bolometric luminosity, ejection velocity, and rate of change of the pseudophotospheric temperature all depend on the speed class of a given nova, it is found that condensation time is also dependent on this factor. The form of the dependence allows the derivation of the explanation sought. This study has been prompted by the observation of classical novae which develop an infrared excess several weeks after visual maximum.
Bode Michael F.
Evans Aaron
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