Fig. 3
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Integrated emission maps of a representative line for seven species on each of the FUor-type young stars. Each map has been centered around the peak of the continuum of the protostar. From top to bottom, the Eup values of the transitions are 108.3, 80.9, 111.5, 115.5, 175.3, 157.7, and 142.4 K. The contours trace the continuum emission and are at the same levels as in Fig. 1.
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