Impact of rotation on synthetic mass–radius relationships of two-layer rocky planets and water worlds

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Volume 701 (September 2025)

A&A, 701 (2025) A274

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Table 5

Input parameters and results for the two-layer, IP planet displayed in Fig. 15.

▼	input
	Flattening parameter, f	0.05
	$A = ρ_{s, 2} / ρ_{2}^{b o t t o m}$ $\biga=\rho_{s,2}/\rho_2^{\rm bottom}$	0.4866

	Relative core size (pole), q	0.15
▼	output
	Equatorial radius, R_eq, in R_⊕	1.7303
	Estimated from the fit, i.e. Eq. (26)	1.7145
	Total mass, M, in M_⊕	5.5999
	Relative mass of the core, M₁ /M	0.0079
	Mean mass-density, $⟨ ρ ⟩$ $\langle \rho \rangle$ , in g/cm³	6.2717
	Central-to-mean mass-density ratio, $ρ_{c} / ⟨ ρ ⟩$ $\rhoc/\langle \rho \rangle$	2.4284
	Top-to-central mass density ratio (core), $ρ_{1}^{t o p} / ρ_{c}$ $\rho_1^{\rm top}/\rhoc$	0.9763
	Rotation period T, in h	6.4036
	Relative size of the core (equator), Q	0.1479
	Interface mass-density jump, $ρ_{1}^{t o p} / ρ_{2}^{b o t t o m} \equiv α$ $\rho_1^{\rm top}/\rho_2^{\rm bottom} \equiv \alpha$	1.7649
	Central-to-surface mass density ratio, ρ_c/ρ_s,2	3.7147
	Central pressure, P_c, in 10⁹ dyn/cm²	8470.46
	Interface pressure, P_i ≡ P(Z₁), in 10⁹ dyn/cm²	7653.08

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