Abstract
AbstractPhoton transport is studied in an interstellar cloud occupying a time‐dependent region V(t)⊂ℝ3. First, under the assumption that the surface ∂V(t) is a known function of t∈[0, tmax], a direct problem is set and proof of well‐posedness is sketched. Then, an inverse problem is examined, under the assumptions that the time behaviour of ∂V(t) is unknown and the photon distribution function is measured at a location far from the cloud. Some numerical experiments are then provided. Copyright © 2010 John Wiley & Sons, Ltd.
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