The long-wavelength thermal emission of the Pluto-Charon system from Herschel observations. Evidence for emissivity effects

E. Lellouch; P. Santos-Sanz; S. Fornasier; T. Lim; J. Stansberry; E. Vilenius; Cs. Kiss; T. Müller; G. Marton; S. Protopapa; P. Panuzzo; R. Moreno

doi:10.1051/0004-6361/201527675

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A&A, 588 (2016) A2

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Table 2

Emissivity models.

Case	Θ_Pl ^a	Θ_CH ^a	Γ_Pl	Γ_CH	ϵ_b^b	ϵ_{70,100,160,250,350,500 μm}^c	Model type

1	6	4.5	22	22	1.0, 0.7, 1.0	CH₄: .7,.6,.45, N/A, N/A, N/A^d	surface temp.
2	6	4.5	22	22	1.0, 0.7, 1.0	CH₄: .67,.80,.84,.58,.53,.43	surface temp.
3	6	4.5	22	22	1.0, 0.7, 1.0	all: .84,.85,.83,.74,.72,.68	surface temp.
4	7	3	26	14	0.9, 0.9, 0.9	all: .85,.86,.84,.74,.72,.70	surface temp.
5	7	3	26	14	0.9, 0.9, 0.9	all: .95,.94,.89,.77,.75,.72	sub-diurnal temp.
6	7	3	26	14	0.9, 0.9, 0.9	all: .85,.86,.84,.75,.735,.71	λ-dept. absorption
3b^e	4.5	2.5	16	12	1.0, 0.7, 1.0	all: .84,.85,.825,.73,.715,.68	surface temp.
4b^e	4.5	2	16	9	0.9, 0.9, 0.9	all: .87,.87,.84,.74,.72,.69	surface temp.
5b^e	4.5	2	16	9	0.9, 0.9, 0.9	all: N/A,N/A,N/A,.91,.85,.80	sub-diurnal temp.
6b^e	4.5	2	16	9	0.9, 0.9, 0.9	all: .87,.87,.84,.755,.74,.73	λ-dept. absorption

Notes.

^(a)

Thermal parameters at Spitzer 2004 epoch.

^(b)

Bolometric emissivities of tholin/H₂O, CH₄ and Charon.

^(c)

Spectral emissivities or either CH₄ only or all units.

^(d)

Spitzer model: spectral emissivities of CH₄ only defined at 70, 100, and 160 μm.

^(e)

Models with seasonal inertia Γ = 2000 MKS. N/A in case 5b indicates no solution.

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