Dynamics of cometary dust temperature

Details Dynamics of cometary dust temperature Dynamics of cometary dust temperature

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnt...16...40a&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 16, no. 1, p. 40-48

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Scientific paper

We consider the determination of the temperature relaxation time for the dust particles which break down to an equilibrium value under the conditions of the cometary outer atmosphere. The calculations are based on the equation defining the dust particle heat variations in the field of the solar radiation with due account for sublimation. The relaxation time complexly depends on particle size, initial conditions, and other model parameter, and it can reach several minutes at 1 AU. The size dependence of the relaxation time is fundamentally different for ice particles polluted by silicates and for those polluted by carbon. The model proposed permits us to solve the problem of thermal equilibrium for the isothermal dust particles sublimating and breaking down under inner and outer factors of the cometary atmosphere and interplanetary medium.

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