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Fig. 5

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Examples of the different line profiles observed in the spectral survey. From the top to the bottom, we show in the left column a narrow line profile for HC18O+ (3–2) and HC3N (25–24) with a two-component Gaussian fit and HC3N (33–32) with a single broad component. In the right column,HCO+ (3–2) has a line profile with redshifted self-absorption, SiO (4–3) has a broad component coming from the outflow, and the profile of CH3OH (11−5–12−4) shows two velocity components tracing the accretion shocks. All the lines are plotted in a window of 70 km s−1 centred on the rest velocity. The dotted red line shows the systemic velocity of the source at –43.13 km s−1.

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