Table 2
Values of the interior structure parameters of Ganymede used in this study.
Layer | dj | ρjd,e (kg m−3) | μjf (GPa) | ηjf,g (log10 Pa s) | σj (S m−1) | Rheology | α |
---|---|---|---|---|---|---|---|
Icy shell | [0, 0.1] · RG | [800, 1200] | 3.3 | [13, 16] | − | Andrade | 1/3 |
Ocean | [0, 0.1] · RG | [ρs, 1200] | − | 4 | [0.1, 5] | Newtonian | − |
HP ice | [0, 0.3] · RG | [ρo, 1400] | 6.6 | 13 | − | Andrade | 1/3 |
Mantle | RG − ∑j≠mdj | [2500, 5000] | 50 | 20 | − | Andrade | 1/3 |
Fluid core | [0.1, 0.5] · RG | [5000, 8000] | − | 4 | − | Newtonian | − |
Notes. The rheological parameters shown here are those used to compute the Love numbers h2 and k2 with the PyALMA3 code. Square brackets indicate the range of values used to sample the parameters. Although the conductivity of the fluid core σc is likely several orders of magnitude larger than that of the ocean, its effects are not modeled in this study, as discussed in Sect. 2.4. References: (d)The range used for the fluid core density is that suggested by Sohl et al. (2002). (e)The ranges for the densities of the hydrosphere layers are similar to those of Baland & Van Hoolst (2010). (f)The values of the rigidities μs, μi, and μm and the viscosity of the mantle (ηm) are from Hussmann et al. (2016). (g)The ocean viscosity (ηo) is the same used in Melini et al. (2022) to model an ocean in ALMA3.
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