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Fig. 11.

Position and velocity of the localised peak positions of the ground-state vibrational 28SiO, 29SiO J = 5 − 4 and 28SiO, 30SiO J = 6−5 emission lines of the π1Gruis ATOMIUM mid-configuration dataset. Contours of the 120 and 768 times the continuum rms noise value (1.5 × 10−5 Jy beam−1) are shown in grey.
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