Production rate of H2O molecules as indicator of the surface temperature of cometary nucleus

Details Production rate of H2O molecules as indicator of the surface temperature of cometary nucleus Production rate of H2O molecules as indicator of the surface temperature of cometary nucleus

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992basi...20..297s&link_type=abstract

Astronomical Society of India, Bulletin (ISSN 0304-9523), vol. 20, no. 3-4, p. 297-302.

Physics

Comet Nuclei, Liquid Surfaces, Molecular Physics, Surface Temperature, Water, Iteration, Specific Heat, Sublimation

Scientific paper

The technique outlined by Feynman (1963) to compute the number of molecules evaporating from a liquid surface has been extended to compute the sublimation rate of H2O molecules from the surface of a cometary nucleus and hence its surface temperature. The application of this technique to a cometary nucleus of typical radius 2.5 km and having a production rate of H2O molecules as 10 exp 29 per second yields 263 K as its surface temperature using iteration method. The error involved is estimated as +/- 5 K if the radius of the nucleus is changed by 0.5 km from the adopted value of 2.5 km.

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