Comparison of integrated intensities of our DCO+ models (contours, 3 and 5σ, σ = 15 mJy beam-1 km s-1) to the observations (image, colors show intensities from 3σ). Colors indicate the velocities included in constructing the zeroth moment maps. Clockwise from the upper left, small figures show: 1) decreasing Tlow,DCO+ and Thigh,DCO+ by 3 K, 2) raising Tlow,DCO+ and Thigh,DCO+ by 4 K, 3) broadening the temperature range from 2 K to 4 K, with χDCO+ halved to maintain the same total DCO+J = 5–4 line flux, 4) reduction of χDCO+ by a factor of 3, and 5) raising χDCO+ by a factor of 3.
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