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Table 5
Parameters of the best-fitting disk model.
| Quantity | Symbol | Value |
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| stellar mass | M ⋆ | 0.2 M⊙ |
| effective temperature | T eff | 3400 K |
| stellar luminosity | L ⋆ | 0.085 L⊙ |
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| disk gas mass⋆ | M gas | 6.1 × 10-4 M⊙ |
| inner disk radius | R in | 0.022 AU |
| outer disk radius⋆ | R out | 8.2 AU |
| column density power index⋆ | ϵ | –0.020 |
| reference scale height⋆ | H0 | 0.011 AU |
| reference radius | r 0 | 0.1 AU |
| flaring power index⋆ | β | 1.09 |
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| disk dust mass⋆ | M dust | 2.6 × 10-8 M⊙ |
| minimum dust particle radius | a min | 0.05 μm |
| maximum dust particle radius | a max | 1 mm |
| dust size dist. power index | p | 4.1 |
| minimum settling particle size | a s | 0 |
| dust settling power index | s | 0 |
| dust material mass density | ρ gr | 3 g cm-3 |
| dust composition | Mg2SiO4 | 32.9% |
| (volume fractions) | amorph. carbon | 24.4% |
| MgFeSiO4 | 23.0% | |
| SiO2 | 8.8% | |
| MgSiO3 | 7.6% | |
| cryst. silicate | 3.3% | |
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| strength of incident ISM UV | χ ISM | 1 |
| cosmic ray H2 ionisation rate | ζ CR | 5 × 10-17 s-1 |
| PAH abundance rel. to ISM⋆ | f PAH | 0.081 |
| chemical heating efficiency⋆ | γ chem | 0.55 |
| α viscosity parameter | α | 0 |
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| disk inclination | i | 40° |
| distance | d | 97 pc |
Notes. Parameters marked with ⋆ have been varied in the evolutionary optimisation run depicted in Fig. 8. The values of the other parameters have been assumed, fitted by hand, or have been obtained from additional evolutionary optimisation runs not discussed here.
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