Table 2
Initial parameters of the dust model.
| Input parameters | Parameter value | Comments |
|---|---|---|
| Particle parameters | ||
| Particle size (m) | 1 × 10−8 – 6.0 × 10−2 | |
| Particle density (kg m−3) | 900 | 1 |
| Spheroid aspect ratio, a/b | 0.2 | 2 |
| Initial particle orientation (deg) | 45 | 3 |
| Gas parameters on the initial surface (less than RN/50 above the nucleus surface) | ||
| Sound speed (m s−1) | 500 | |
| Gas composition | 10 × H2O + CO2 | 4 |
| Gas production rate Qgas (molec s−1) | 2 × 1027 | |
| Gas temperature (K) | 100 | |
| Gas density (kg m−3) | 1.0 × 10−6 | |
| 67P/CG parameters | ||
| Radius, RN (m) | 2.0 × 103 | (Sierks et al. 2015) |
| Mass, mN (kg) | 1.0 × 1013 | (Pätzold et al. 2016) |
| Surface temperature, TN (K) | 200 | (Capaccioni et al. 2015) |
Notes. (1) Constrained by the GIADA data (Fulle et al. 2016b, 2017). (2)Compatible with the GIADA measurements (Fulle et al. 2016b, 2017). (3) Compatible with the density used to reproduce particle speeds measured by GIADA (Ivanovski et al. 2017a). (4) All these parameters are derived by the Euler gas flow solutions calibrated with the DCMC 3D+t gas solutions constrained by ROSINA data (Fougere et al. 2016).
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