Fig. 8
Illustration of four simplified models of the LOS sampled by a Planck beam; a) stars located in a portion of the ISM where B is uniform and beyond the last star B is not uniform; b) stars located in a portion of the ISM where B is uniform and beyond the last star B is uniform with a possibly different mean direction; c) stars located in a portion of the ISM where B is not uniform and beyond the last star B is not uniform; and d) stars located in a portion of the ISM where B is not uniform and beyond the last star B is uniform.
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