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Table 9
Parameters of the FT Tau model.
| Parameter | Symbol | Comments | Value |
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| Stellar luminosity | L ∗ | Derived from observations | 0.35 L⊙ |
| Stellar mass | M ∗ | ” | 0.3 M⊙ |
| Stellar radius | R ∗ | ” | 1.7 R⊙ |
| Effective temperature | T eff | ” | 3400 K |
| Distance | d | ” | 140 pc |
| Slope of UV excess distribution | p UV | Fixed in MCFOST | 2.0 |
| Slope of grain size distribution | a pow | ” | 3.5 |
| Dust mass density | ρ d | ” | 3.5 g cm-3 |
| Slope of surface mass density | ϵ | ” | + 1 |
| Flaring reference radius | R 0 | Explored with MCFOST | 100 AU |
| Flaring reference height | H 0 | ” | 12, 14 AU (high/low fUV) |
| Flaring exponent | β | ” | 1.15 |
| Disk inner radius | R in | ” | 0.09, 0.05 AU (high/low fUV) |
| Minimum dust grain size | a min | ” | 0.05, 0.1 μm (high/low fUV) |
| Maximum dust grain size | a max | ” | 1 cm |
| Stratification exponent | s set | ” | 0.2, 0.3 (high/low fUV) |
| Stratification grain dimension | a set | ” | 0.05, 0.1 μm (high/low fUV) |
| Inclination | i | ” | 60° |
| Disk outer radius | R out | ” | 50, 100, 200 AU |
| Optical extinction | A V | Free parameter in MCFOST | 1.6 |
| Disk dust mass | M d | ” | 9 × 10-4 M⊙ |
| Cosmic Ray Ionization rate | ζ | Fixed in ProDiMo | 1.7 × 10-17 s-1 |
| UV excess | f UV | Explored with ProDiMo | 0.07, 0.025 |
| PAH abundance | f PAH | ” | 10-2,10-3,10-4 |
| Disk gas mass | M g | ” | (9, 4.5, 1.8) × 10-2 M⊙ |
Notes. The difference between an “explored” and “free” parameter is that the former is set after an exploratory parameter study, while the latter is derived using χ2 fitting of the SED.
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