Open Access
Table 3
DALI model parameters.
| Parameter | Unit | HD 16329 | 6 HD 100546 | Description |
|---|---|---|---|---|
| M* | [M⊙] | 2.0 | 2.5 | Stellar mass |
| Teff | [K] | 9000 | 10 500 | Stellar (blackbody) temperature |
| Lbol | [L⊙] | 17 | 28 | Stellar luminosity |
| Σc | [g cm−2] | 1.55 | 18 | Σgas at Rc |
| Δgd | 30 | 90 | Gas-to-dust mass ratio | |
| ψ | 0.10 | 0.23 | Flaring angle | |
| hc | [radians] | 0.07 | 0.18 | Scale height at Rc |
| γ | 0.9 | 1 | Power-law exponent of Σ(r) | |
| Rc | [au] | 125 | 50 | Critical radius |
| Rin | [au] | 0.35 | 0.25 | Dust inner radius |
| Rout | [au] | 600 | 400 | Disc outer radius |
| Mgas | [10−2 × M⊙] | 1.54 | 1.57 | Disc gas mass |
| Mdust | [10−4 × M⊙] | 5.15 | 1.68 | Disc dust mass |
| χ | 0.2 | Degree of settling | ||
| flarge | 0.85 | Large-to-small dust mass ratio | ||
| amin | [µm] | 0.02 | 0.05 | Minimum grain size |
| q | 3.0 | 3.5 | Power-law exponent of grain size population | |
| PAHs | [%] | 0.01 | 1.0 | PAH abundance in gas with respect to the ISM |
| Rcav,in – Rcav,out | [au] | 4.0–13.0 | Dust cavity | |
| δgas,cav | 10−5 | Gas density drop for Rcav,in < R < Rcav,out | ||
| δsmall,cav | 10−5 | Small dust density drop for Rcav,in < R < Rcav,out | ||
| δlarge,cav | 0 | Large dust density drop for Rcav,in < R < Rcav,out | ||
| Rgap,in – Rgap,out | [au] | 50–150 | Dust gap | |
| δgas,gap | 10−1 | Gas density drop for Rgap,in < R < Rgap,out | ||
| δsmall,cav | 10−1 | Small dust density drop for Rgap,in < R < Rgap,out | ||
| δlarge,cav | 0 | Large dust density drop for Rgap,in < R < Rgap,out |
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