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Table 1
Initial conditions, fixed parameters and variables.
| Description | Symbol | Value |
|---|---|---|
| Initial conditions and fixed parameters | ||
| Disk physical structure | ||
| Central stellar mass | M⋆ | 1 M⊙ |
| Surface density at 1 AU | Σ1 AU | 15 000 kg m−2 |
| Temperature at 1 AU | T1 AU | 300 K |
| Exponential taper radius | rtaper | 40 AU |
| Σ density power law slope | p | 1 |
| T power law slope | q | 0.5 |
| Total initial disk mass | Mgas,0 | 0.02 M⊙ |
| Disk FWHM angle | hFWHM | 0.05 rad |
| Dust properties | ||
| Gas-to-dust ratio | g/d | 100 |
| Monomer size | asmall | 0.1 μm |
| Grain density | ρs | 2.5 g cm−3 |
| Drift lim. large grain frac. | fm, drift | 0.97 |
| Frag. lim. large grain frac. | fm, frag | 0.75 |
| Num. factor fragmentation size | ff | 0.37 |
| Num. factor drift size | fd | 0.55 |
| Chemical parameters | ||
| Sticking fraction | fs | 1.0 |
| Cosmic ray ionisation rate |  |
10−17 s−1 |
| Number of active ice layers | Nact | 2 |
| Step radius water |  |
3 AU |
| Inner disk H2O abundance |  |
1.2 × 10−4 |
| Outer disk H2O abundance |  |
1.2 × 10−4 |
| H2O binding energy |  |
5600 K |
| H2O desorption prefactor |  |
1030 cm−2 s−1 |
| H2O CR destruction efficiency |  |
1800 |
| Step radius CO2 |  |
10 AU |
| Inner disk CO2 abundance |  |
1 × 10−8 |
| Outer disk CO2 abundance |  |
4 × 10−5 |
| CO2 binding energy |  |
2900 K |
| CO2 desorption prefactor |  |
9.3 × 1026 cm−2 s−1 |
| Variables | ||
| Viscosity parameter | α | |
| Fragmentation velocity | uf | |
| CO2 destruction rate |  |
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