Abstract Based on the computed equilibrium temperature of evaporating dirty water-ice grains, dirty water-ice halo is examined, taking into account of a size dependence of terminal velocity of dust at P/Halley. It is found that due to an enhanced grain's temperature caused by dirtiness, icy halo cannot extend over 100 km from the nucleus when comet approaches inside a solar distance r of 1 AU. Therefore, it is unlikely that the ice bands in the near infrared wavelengths could be detected in the cometary coma at r<1 AU.
Dirty ice grains in comets
Advances in Space Research ; 5 , 12 ; 339-342
1985-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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