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Table 2
Parameters for both sources. For definitions, see Fig. 2.
| Parameter | HD 100546 | TW Hya |
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| Star | ||
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| L ⋆ | 36 L⊙ | 0.28 L⊙ |
| Teff | 10 390 ± 600 K | 4110 K |
| M ⋆ | 2.3 ± 0.2 M⊙ | 0.74 M⊙ |
| R ⋆ | 1.5 ± 0.3 R ⊙ | 1.05 R⊙ |
| d | 97 pc | 55 pc |
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| Disk | ||
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| Inner disk Rsubl–Rgap | 0.25–4.0 au | 0.05–0.3 au |
| Inner hole Rcav | 13 au | 4 au |
| Inner hole Σ scalings | δgas = 100–101 | δgas ~ 10-2 |
| δdust = 10-5 | δdust = 10-2 | |
| γ | 1.0 | 1.0 |
| χ, f | 0.8, 0.85 | 0.2, 0.99 |
| R c | 50 au | 35 au |
| Σc | 58 g cm-2 | 30 g cm-2 |
| hc, ψ | 0.10, 0.25 | 0.10, 0.30 |
| Δgas / dust | 10–300 | 200 |
| Total gas mass | 3.2 × 10-2 M ⊙ | 2.3 × 10-2 M ⊙ |
| Total dust mass | 8.1 × 10-4 M ⊙ | 1.1 × 10-4 M ⊙ |
| L X | 7.94 × 1028 erg s-1 | 1.4 × 1030 erg s-1 |
| T X | 7 × 107 K | 3.2 × 106 K |
| ζ cr | 5 × 10-17 s-1 | 5 × 10-19 s-1 |
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| Derived abundances | ||
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| [C]/[H]gas | (0.1−1.5) × 10-4 | (0.2−5.0) × 10-6 |
| [O]/[H]gas | (0.14−1.4) × 10-4 | ~1 × 10-6 |
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