Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.219..197y&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 219, March 1, 1986, p. 197-202.
Astronomy and Astrophysics
Astronomy
Comet Nuclei, Conductive Heat Transfer, Solar Orbits, Heat Flux, Surface Temperature, Temperature Distribution, Comets, Comet Nuclei, Thermal Properties, Conduction, Composition, Ice, Temperature, Crystalline, Surface, Depth, Sublimation, Symmetry, Comae, Theoretical Studies, Comparisons, Observations, Brightness, Halley
Scientific paper
An investigation is made of heat conduction in a cometary nucleus as it orbits about the Sun. Even if the nucleus is made of crystalline ice which has a higher conductivity than amorphous ice, the surface temperature can penetrate only up to a few tens of metres below the surface. The difference between the surface temperature which a comet without heat conduction would have and the surface temperature allowing for heat conduction is less than 20K. The cometary nucleus with heat conduction gives asymmetry in the heat available for sublimation before and after perihelion, and the result obtained here is in accord with the observed asymmetry in the coma brightness of P/Halley at the 1910 appearance.
Hatta N.
Yabushita Shin
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