Fig. A.1
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The Keplerian mask used during the imaging process shown here on channels from the HD 121617 12CO image cube. The mask is created using stellar parameters (see Table C.1) assumes the gas is moving in Keplerian rotation around the star. The masks were created using the keplerian_mask package (Teague 2020). The ellipse in the lower left corners is the synthesized beam of the observation.
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