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Table 3
Central mass and 
values for the Keplerian and infalling fits employed in Figs. 9 and 10.
| Species | Fit | Central mass |  |
|---|---|---|---|
| [M⊙] | |||
| Disk-like structure | |||
| C17O | Keplerian | 2.2 ± 0.2 | 3.3 |
| Infalling | 1.5 ± 0.2 | 3.3 | |
| H13CO+ | Keplerian | 2.2 ± 0.2 | 6.5 |
| Infalling | 1.5 ± 0.2 | 15.1 | |
| High-density region | |||
| c−C3H2 | Keplerian | 2.2 ± 0.2 | 4.6 |
| Infalling | 3.6 ± 0.3 | 2.4 | |
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