Fig. 4.
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The χ2 maps for HCN, CO2 + 13CO2, C6H6, C2H4, C2H6, CH4, and water. The color scale shows the χmin2/χ2. The best fit model (χmin2/χ2 = 1) is marked with a red circle. A red contour denotes the emitting region radius as listed in Table 2. Gray contours show the emitting radii in au while white contours represent the 1σ, 2σ, and 3σ levels.
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