CO(2–1) emission at the star velocity (V∗ = −26.5 km s-1) at different scales: left frame: 380′′ × 380′′ SMA map (HPBW 3′′) with, at its center, the 90′′ × 80′′ 27 field mosaic ALMA map; center frame: ALMA map (HPBW 0.34′′ × 0.31′′) at an enlarged scale; and right frame: zoom on the 12′′ × 12′′ inner region of the envelope. No SD data has been added. The color code in the right panel is chosen to underline the bright arcs. The circles illustrate a possible fit of the arc-like features with slightly off-centred circular arcs. The blue dots show the SMA and ALMA half-power beam widths. Position (0, 0 black cross) corresponds to the star 09h47m57.4492s 13°16′43.884′′ – see Table 1.
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