Evidence for SiO cloud nucleation in the rogue planet PSO J318

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Volume 703 (November 2025)

A&A, 703 (2025) A79

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Table 4

Ranked list of likely cloud species obtained from full retrievals.

Species, structure, shape	ΔBIC	log₁₀(B)
SiO, amorph., sph.	0.00	0
SiO, amorph., irr.	56.55	12.28
MgSiO₃, amorph.^(g), irr.	148.21	32.18
MgSiO₃, cryst., sph.	185.43	40.27
MgSiO₃, amorph.^(g), sph.	197.17	42.81
Mg_0.5Si_0.5O₃, amorph.^(s), irr.	211.87	46.01
MgSiO₃, amorph.^(s), irr.	355.48	77.19
Mg₂SiO₄, amorph.^(s), irr.	432.38	93.89
MgSiO₃, amorph.^(s), sph.	533.39	115.82
Mg₂SiO₄, amorph.^(s), sph.	746.05	162.00
MgFeSiO₄, amorph.^(g), sph.	856.21	185.92

Notes. pRT retrievals were run over the full wavelength range of the considered data (1–18 μm). The table lists ΔBICs and corresponding Bayes factors for rejection with respect to the retrieval model with the best fitting cloud species in the first line. (g) Glassy. (s) Sol–gel.

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