Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152l..17y&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 2, Nov. 1985, p. L17-L20.
Astronomy and Astrophysics
Astrophysics
13
Comet Nuclei, Condensation, Hydrodynamics, Ice Formation, Emission Spectra, Halley'S Comet, Infrared Spectra, Sublimation, Visible Spectrum, Comets, Condensation, Ice, Particles, Comet Nuclei, Production Rate, Water, Formation, Sublimation, Physical Properties, Scattering, Calculations, Thermal Properties, Emissions, Spectra, Models
Scientific paper
It is found that water molecules once sublimated from a cometary nucleus recondense into very fine pure ice particles in the circumnuclear region when the H2O production rate is larger than ≡1029s-1. The authors present a picture of the formation and subsequent sublimation of these ice particles and discuss their properties at the encounters of the spacecrafts to Halley's comet in march 1986. The scattering and thermal emission spectra from these particles are calculated for the above conditions.
Ashihara Osamu
Yamamoto Tadahiro
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