(a) Three-color image of Oph IRS 63, where red, blue, and green represent emissions from the 1.3 mm continuum, SO (5₆ – 4₅) (moment 0), and SO₂ (8_3,5 – 8_2,6) (moment 0), respectively. The synthesized beam is shown in the lower left corner, (b) Moment 0 map of SO (5₆ – 4₅) toward Oph IRS 63. The two dashed white ellipses denote the two dust rings of the protoplanetary disk revealed by Segura-Cox et al. (2020). The solid white ellipse represents the SO ring. Four spiral structures (SI to S4) are shown as white curves, (c) Moment 0 map of SO₂ (8_3,5 – 8_2,6) toward Oph IRS 63. The white ellipse and curves have the same meanings as in panel b. Note that the images shown here represent only a portion of the field of view of the observation and are centered at RA (J2000) = 16^h31^m35.65^s, Dec (J2000) = –24^d01^m30.1^s.