Free Access
Table 1
Input parameters for thermal evolution modeling.
| Parameter | Value | Description |
|---|---|---|
| Material properties | ||
| ρgra (kg m−3) | 2300 | Average graphite density (Sect. 2.1) |
| ρsil (kg m−3) | 3300 | Average enstatite density (Sect. 2.1) |
| ρiron (kg m−3) | 9000 | Average iron density (Sect. 2.1) |
| CP,gra (J K−1 kg−1) | 700 | Specific heat of graphite (Boylan 1996) |
| CP,sil (J K−1 kg−1) | 1250 | Specific heat of silicate (Schubert et al. 2001) |
| CP,iron (J K−1 kg−1) | 550 | Specific heat of iron (Schubert et al. 2001) |
| αgra (K−1) | 3 × 10−5 | Thermal expansivity of graphite (Morgan 1972) |
| αsil (K−1) | 3 × 10−5 | Thermal expansivity of silicate (Schubert et al. 2001) |
| kgra(T) (W m−1 K−1) | 42327T−1.035 + 0.00103T | Thermal conductivity of graphite (Hofmeister et al. 2014, Graphite AXM, Table 1) |
| ksil (W m−1 K−1) | 5 | Thermal conductivity of silicate (Schubert et al. 2001) |
| Egra (kJ mol−1) | 209 | Activation energy of graphite (Wagner & Driesner 1959) |
| Esil (kJ mol−1) | 300 | Activation energy of silicate (Schubert et al. 2001) |
| Agra,min. (109 Pa s) | 5.3 | Rheology prefactor for graphite (min. shear modulus, Cost et al. 1968) |
| Agra,max. (109 Pa s) | 185 | Rheology prefactor for graphite (max. shear modulus, Min & Aluru 2011) |
| Asil (109 Pa s) | 160 | Rheology prefactor for silicate (assuming η (1600 K) = 1021 Pa s) |
| Model properties | ||
| Tsurf (K) | 700 | Planet surface temperature (Kepler-37b, Barclay et al. 2013) |
| T0,lid-bot (K) | 1700 | Initial temperature at the bottom of the lid |
| T0,man (K) | 2000 | Initial mantle temperature |
| T0,core (K) | 3000 | Initial core temperature |
| H0 (10−12 W kg−1) | 34.5 | Initial internal heating rate of the mantle (Turcotte & Schubert 2002) |
| τ (Gyr) | 2.95 | Characteristic decay time of radioactive (Turcotte & Schubert 2002) |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.