homework4

Homework4

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Unformatted text preview: the equilibrium temperature in terms of its sound speed cs and the aforementioned parameters. (b) If the temperature is perturbed from its equilibrium value by an amount ΔTd, calculate the time constant τT for the grain to restore its equilibrium temperature. You may assume |ΔTd|<<Td. (c) Suppose that the grain actually receives photons stochastically, i.e. it receives energy in packets of energy EUV, at a mean rate ΓUV = Leq/EUV. Derive a formula for the value of the grain temperature perturbation ΔTd(t) at time t in terms of the arrival times of all previous photons. [Hint: Remembe...
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This document was uploaded on 03/08/2014 for the course AY 102 at Caltech.

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