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Fig. 3
Infall asymmetries based on the HCO+, H13 CO+, and NH3 data shownin Fig. A.1. The infall asymmetry is defined as the velocity of the optically thick line (HCO+) minus the velocity of the optically thin line (H13CO+ or NH3) divided by the FWHM line width of the optically thin line as defined by Mardones et al. (1997).
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