HE 0433-1028. Top: the integrated 13CO(2–1) flux image for natural weighting obtained for a velocity range from −75 to +75 km s-1. Black contours are in steps of (2 (red), 2.5, 3, 4) × 1σrms - int (=0.8 Jy beam-1 km s-1). The beam size is 3.9′′ × 1.6′′. Bottom: the 12CO(2–1)/13CO(2–1) luminosity ratio with black contours in steps of 2 from 4 to 18. Gray contours show the naturally weighted integrated 12CO(2–1) flux as in Fig. 2.
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