Fig. 7

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Left: ratio of H12CN(3-2) over Si16O(6-5) intensities integrated over |Vɀ|<5 km s–1. The ellipse has a size of 2 × 2=4 beam FWHM area, centred at 50 mas east. Right: ratio of the Doppler velocity spectra of H12CN(3–2) to Si16O(6–5) (black), H13CN(3–2) (blue, divided by 10) and 12CS(5–4) (red, divided by 10) emissions integrated over the ellipse shown on the left panel.
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