
doi: 10.1007/bf00643762
The maximum temperature a typical interstellar grain will attain upon absorption of a photon or chemical band formation of molecules on its surface is calculated by considering the exact Debye theory of dielectrics. Other contributions to the specific heats of solids are discussed. It is shown that the use of the approximate Debye theory whereC v is proportional toT will lead to serious errors in the calculation of velocities of desorption of molecules from grain surfaces.
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