Left: integrated emission map of HCO+ (blue) from 0–12 km s-1 with contours showing 3, 10, and 17σ emission (σ = 25 mJy beam-1 km s-1). The white-bordered black line shows the positions from which we constructed the position–velocity diagram (middle-left), and the gray box shows the smaller region for which we show H13CO+ and DCO+ line emission (middle-right and right). Middle-left: the HCO+ position–velocity diagram. The magenta curves show the Keplerian velocity profile for an assumed stellar mass of 2.3 M⊙, disk inclination of 44°, and systemic velocity of 5.8 km s-1. Middle-right: integrated emission map of H13CO+ (green) from 0.8–10.4 km s-1 with contours showing 3, 5, and 7σ emission (σ = 14 mJy beam-1 km s-1). Right: integrated emission map of DCO+ (red) from 0.8–10.4 km s-1 with contours showing 3 and 5σ emission (σ = 18 mJy beam-1 km s-1). The 19 K contour of the midplane temperature at a radius of 155 AU in the model disk is overlaid on the DCO+ emission using a white-bordered black ellipse. In the maps of integrated emission, the ~065 × 044 beam is shown in the lower left, while a scale is shown in the lower right.
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