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Table 2

Best-fit normalized models.

H2CO 303–202

Abundance model p Tc [K] Rina [AU] Rc [AU] X 1 / X 2

Low-temperature 24 ± 2 65 ± 15
Power-law +0.5 50
Temperature step 16 ± 2 50 230 ± 60 0.5
Radial step 15 ± 1 50 270 ± 20 0.5

C18O 2–1

Abundance model p Tc [K] Rina [AU] Rc [AU] X 1 / X 2

Power-law 2 0.1
Temperature step 32 ± 2 0.1 32 ± 5 10
Radial step 15 ± 1 0.1 290 ± 20 10

Notes. χ2 values are reduced by the number of points and free parameters in each model.

(a)

Fixed parameter.

(†)

Indicates the corresponding midplane value to the best-fit model parameter based on the density and temperature structure of the Mathews et al. (2013) physical model.

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