Uranus’s complex internal structure | Astronomy & Astrophysics (A&A)

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Table 2

Key parameters for all evaluated models consisting of H–He, water, rock, and potentially iron.

Model name	T_c (K)	S₀ − S_c (erg K⁻¹ g⁻¹)	r_{a→ na}	M_XY (M_⊕)			M_Fe (M_⊕)	w:r ratio	ρ_c (kg m⁻³)
model 1 CC	27 854	8.601−7.339	0.559	0.12	10.24	3.96	0.22	2.6	11 523
model 2 CC	20 182	8.605−7.275	0.626	0.14	13.07	0.63	0.70	20.7	14358
model 3 CC	12 740	8.595−7.201	0.753	0.48	12.78	0.87	0.40	14.7	11 701

model 1 P_V	7457	8.598−7.334	0.837	1.25	11.60	1.68	0	6.9	6035
model 2 P_V	9822	8.599−7.505	0.822	0.81	12.88	0.84	0	15.3	4893
model 3 P_V	10 600	8.598−7.489	0.826	0.96	12.33	1.25	0	9.9	5159
model 4 P_V	9773	8.596−7.496	0.801	0.66	12.97	0.91	0	14.2	4964
model 5 P_V	9135	8.596−7.419	0.812	0.92	12.24	1.38	0	8.9	5546

model 1 P_H	17 130	8.596−7.466	0.742	0.27	12.26	2.00	0	6.1	6070
model 3 P_H	11 938	8.603−7.466	0.760	0.77	11.57	2.20	0	5.3	5672
model 4 P_H	11 948	8.600−7.479	0.759	0.75	11.50	2.28	0	5.0	5556

Notes. The models are separated into three groups: The first group consists of models with a high central density (see Fig. 1). The second group uses the slower rotation period of Uranus (P_V) to calculate its structure. The third group uses the faster rotation period (P_H) instead. M_XY, , and M_Fe are the total bulk abundances of H–He, water, rock and iron, respectively. Finally, w:r is the water-to-rock ratio. Note that compared to pure rock models (Table 1) these models tend to have lower central temperatures and higher bulk heavy-element abundances.

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