Evidence for stellar contamination in the transmission spectra of HAT-P-12b

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Volume 656 (December 2021)

A&A, 656 (2021) A114

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Table 5

Bayesian evidence under different atmospheric model assumptions.

Hypothesis	Gas absorption ^(a)	Condensates ^(b)	Stellar contamination ^(c)	D^(d)
: full model	✓	✓	✓	16	323.43 ± 0.12	0
: no gas absorption	×	✓	✓	14	309.35 ± 0.12	–14.08
: no condensates	✓	×	✓	12	324.00 ± 0.12	0.57
: only contamination	×	×	✓	10	307.56 ± 0.11	–15.87
: no contamination	✓	✓	×	8	315.25 ± 0.10	–8.18
: only condensate	×	✓	×	6	312.39 ± 0.07	–11.04
: clear atmosphere	✓	×	×	4	318.80 ± 0.09	–4.63
: pure H₂ and He	×	×	×	2	310.44 ± 0.08	–12.99

Notes. ^(a) Two additional parameters: Z and C/O. ^(b) Four additional parameters: P_cld, r_m, H_aero ∕H_gas, and n₀. ^(c) Four additional parameters for each observation: ΔT_spot, ΔT_facu, ϕ_spot, and ϕ_facu. ^(d) Model dimensionality. ^(e) Logarithmic Bayes factor, .

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