From thermal dissociation to condensation in the atmospheres of ultra hot Jupiters: WASP-121b in context

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Table 1

Coefficients for approximating atomic and molecular abundances following Eqs. (1) and (2).

Species	α	10⁻⁴ β	γ	log₁₀A₀
H₂	1	2.41	6.5	–0.1
H₂O	2	4.83	15.9	–3.3
TiO	1.6	5.94	23.0	–7.1
VO	1.5	5.40	23.8	–9.2
H⁻	0.6	–0.14	7.7	–8.3
Na	0.6	1.89	12.2	–5.5
K	0.6	1.28	12.7	–7.1

Notes. with A_d = 10^−γP^α10^β∕T. P in bar, T in Kelvin. Valid for a solar-composition gas with 2000 K < T < 4000 K and 200 bar < P < 1 μ bar.

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