Position-velocity plots along the direction with PA = 157° towards core B for different species and transitions. The offsets are measured from the dust peak position of core B (see Table 2), positive towards southeast. Contour levels start at 10%, increasing in steps of 10% of the peak: a) 0.53, b) 0.72, c) 0.08, d) 0.33, e) 0.10, f) 0.51, g) 0.56, h) 0.27, i) 0.09, j) 0.37, k) 0.02 and l) 0.52 Jy km s-1. The white solid line marks the border of the region where emission is expected for an edge-on Keplerian disk of radius (2600 AU) rotating about a 18 M⊙ central mass.
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