Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rpsct...1...78m&link_type=abstract
In its JPRS Report: Science and Technology. USSR: Space date) p 78 (SEE N87-29547 24-12) Transl. into ENGLISH from Astronomiches
Astronomy and Astrophysics
Astronomy
Comet Nuclei, Cometary Atmospheres, Mathematical Models, Thermodynamics, Astronomical Photometry, Brightness, Dust, Gas Flow, Particle Size Distribution, Radiative Transfer, Solar Radiation
Scientific paper
A model of the physical processes transpiring in a cometary nucleus and the circumnucleus region was devised. In the model it is assumed that an atmosphere consisting of a mixture of gas and fine dust particles, which are transported from the nucleus by the gas flow, is formed at small heliocentric distances during disintegration of the cometary nucleus as a result of heating by solar radiation and sublimation of its volatile components. In the first stage of the work, the temperature distribution in the nucleus was found using a quite complete thermal model of a spherically symmetric nucleus. In the second stage, a photometric model of the gas-dust cometary atmosphere in the circumnucleus region was computed by numerical solution of the radiation transfer equation in the optical wavelength range. A photometric model of the gas-dust atmosphere was computed.
Kolesnichenko Aleksander V.
Skorov Yu. V.
Ya Marov Mikhail
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