Thermal behavior of rocky material in contact with ice

Details Thermal behavior of rocky material in contact with ice Thermal behavior of rocky material in contact with ice

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...421..350k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 421, no. 1, p. 350-354

Astronomy and Astrophysics

Astrophysics

3

Comets, Dust, Icy Satellites, Irradiation, Rocks, Solar Radiation, Sun, Heat Transfer, Jupiter Satellites, Saturn Satellites, Surface Temperature, Temperature Distribution, Thermodynamics, Three Dimensional Models

Scientific paper

A large class of bodies in the solar system consists of ices mixed 'dusty' or 'rocky' material (e.g., comets, rings, icy satellites). In the present paper we study the thermal behavior of such a mixed body in response to irradiation by the Sun. In contrast to the traditional approach, where the effects of a dust mantle are considered from a macroscopic point of view, we focus on the behavior of single grains or boulders. A three-dimensional model for a dust particle, or a piece of refractory dark material in contact with a volatile ice surface, is presented. Example solutions are calculated, which illustrate the influence of different heat transfer paths (radiation, conduction), the particle size, and the contact area (Hertz factor) upon the solutions. Subsequently, our model is used to interpret some results of a recent comet simulation experiment, and, finally, it is applied to estimate the temperature contrasts on the surface of the icy satellites of Jupiter and Saturn.

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