Fig. 4
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PV diagram of spectral lines toward the disk candidates, cut along the dashed black lines shown in Fig. 3. The dashed red lines show the Keplerian rotation curves for central masses labeled in the upper left. The black contours correspond to 3, 5, 7, 9,11, and 13 σ levels. The vertical line marks the reference point. The horizontal line indicates the systemic velocity.
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