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Fig. 6.
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Gaussian fits of the absorption and emission features of the CO (J = 3→2) and HCO+ (J = 4→3) spectra belonging to the central beam on top of the peak of the continuum relative to systemic velocity. The dotted line indicates –1 times the rms of the spectrum. For the systemic velocity, we used a value of 1130 km/s.
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