Table 3
Best-fit models for the molecular lines.
| Parameters | 12CO 2 −1 & 3-2 | 13CO 2-1 & C18O 2-1 | HCO+ 3-2 | |
|---|---|---|---|---|
| δV | (km s−1 ) | 0.20 ± 0.01 | 0.15 ± 0.01 | 0.15 |
| Tatm (r) | (K) | 31.2 ± 0.2(r/R0)−0.68±0.02 | 16.8 ± 0.2 (r/R0)0.07±0.01 | 15.0 ± 0.2 (r/R0)(−0.12±0.03) |
| Tmid (r) | (K) | min(Tatm, 7.4 ± 0.2(r/R0)−0.27) | min(Tatm, 10.4 ± 0.1 (r/R0)(−0.27±0.03) | min(Tatm, 9.1 ± 0.4(r/R0)−0.27 |
| H (r)= | (au) | 27.9 ± 0.2 (r/R0)1.16±0.02 | 24.0 ± 0.2 (r/R0)1.25±0.03 | 30.8 ± 0.8 (r/R0)0.93±0.13 |
| ∑(r) | (cm−2) | 8.2 ± 1.2 1018(r/R0)−3.1±0.2 | 13CO : 4.5 ± 0.4 1017 (r/R0)−3.3±0.2 C18O: 1.9 ± 0.1 1016 (r/R0)−3.3±0.2 |
6.1 ± 1.01013 (r/R0)−1.6±0.9 |
| Σdep | (cm−2) | 3.7 ± 0.4 1022 | 3.5 ± 0.1 1022 | 8.7 ± 0.2 1022 |
| Inclination | (°) | 85.5 ± 0.6 | 89.8 ± 0.4 | 87.4 ± 0.8 |
| Rin | (au) | 61 ± 1 | 77 ± 2 | 53 ± 1 |
| Rout | (au) | 760 ± 5 | 790 ± 6 | 521 ± 2 |
Notes. The error bars are the 1σ formal errors. All parameters are defined in Appendix B. Parameters without error bars were fixed. The distance is 160 pc and the VLSR is 7.35 km s−1. The midplane temperature exponent is only loosely constrained, and we therefore fixed its value to the value found from 13CO 2-1 for all lines. Following Eq. (B.3), we fixed the exponent δ that controls the steepness of the gradient to 2.5 (see Appendix B). The pivot R0 was fixed at 100 au to maximize the sensitivity. For all lines, we verified that the disk is in Keplerian rotation.
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