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Home All issues Volume 693 (January 2025) A&A, 693 (2025) A298 Full HTML
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Table C.1

Description of the free parameters of the retrieval, prior ranges, and best-fit values.

Parameter Description Prior range best-fit
log 12CO log mixing ratio of 12CO [−12.0, −2.0] −3.4−0.2+0.2${ - 3.4_{ - 0.2}^{ + 0.2}}$
log 13CO log mixing ratio of13 CO [−12.0, −2.0] −5.2−0.2+0.2${ - 5.2_{ - 0.2}^{ + 0.2}}$
log H2O log mixing ratio of H2O [−12.0, −2.0] −3.4−0.2+0.2${ - 3.4_{ - 0.2}^{ + 0.2}}$
log HF log mixing ratio of HF [−12.0, −2.0] −7.6−0.2+0.2${ - 7.6_{ - 0.2}^{ + 0.2}}$
log Na log mixing ratio of Na [−12.0, −2.0] −5.8−0.3+0.3${ - 5.8_{ - 0.3}^{ + 0.3}}$
log Ca log mixing ratio of Ca [−12.0, −2.0] −5.4−0.2+0.2${ - 5.4_{ - 0.2}^{ + 0.2}}$
log Ti log mixing ratio of Ti [−12.0, −2.0] −7.7−1.4+0.6${ - 7.7_{ - 1.4}^{ + 0.6}}$
log ɡ [cm/s2] log surface gravity [2.0, 5.0] 3.83−0.18+0.17${3.83_{ - 0.18}^{ + 0.17}}$
υ sin i [km/s] projected rotational velocity [2.00, 20.00] 5.56−0.02+0.02${5.56_{ - 0.02}^{ + 0.02}}$
υrad [km/s] radial velocity [−20.00, 20.00] −0.49−0.02+0.02${ - 0.49_{ - 0.02}^{ + 0.02}}$
∇T,0 temperature gradient at P0 = 102 bar [0.04, 0.34] 0.17−0.06+0.05${0.17_{ - 0.06}^{ + 0.05}}$
∇T,1 temperature gradient at PRCE + 2ΔPbot [0.04, 0.34] < 0.06
∇T,2 temperature gradient at PRCE + ΔPbot [0.04, 0.34] < 0.06
∇T,RCE temperature gradient at PRCE [0.04, 0.34] 0.32−0.02+0.01${0.32_{ - 0.02}^{ + 0.01}}$
∇T,3 temperature gradient at PRCE − ΔPtop [0.00, 0.34] 0.05−0.03+0.03${0.05_{ - 0.03}^{ + 0.03}}$
∇T,4 temperature gradient at PRCE − 2ΔPtop [0.00, 0.34] 0.07−0.02+0.03${0.07_{ - 0.02}^{ + 0.03}}$
∇T,5 temperature gradient at P5 = 10−5 bar [0.00, 0.34] 0.14−0.08+0.09${0.14_{ - 0.08}^{ + 0.09}}$
Δ log Pbot [bar] log pressure shift of lower PT knots [0.20, 1.60] 0.27−0.04+0.05${0.27_{ - 0.04}^{ + 0.05}}$
Δ log Ptop [bar] log pressure shift of upper PT knots [0.20, 1.60] 0.75−0.14+0.15${0.75_{ - 0.14}^{ + 0.15}}$
log PRCE [bar] log pressure of RCE [−3.00, 1.00] −0.72−0.04+0.03${ - 0.72_{ - 0.04}^{ + 0.03}}$
T0 [K] temperature at 102 bar [2000, 10000] 4591−670+680${4591_{ - 670}^{ + 680}}$
X airmass [0.70, 1.60] 1.25−0.01+0.01${1.25_{ - 0.01}^{ + 0.01}}$
log a GP amplitude [−2.00, 0.40] 0.2173−0.0024+0.0025${0.2173_{ - 0.0024}^{ + 0.0025}}$
log l [nm] GP length scale [−2.00, −1.20] −1.6100−0.0003+0.0038${ - 1.6100_{ - 0.0003}^{ + 0.0038}}$

Notes: The best-fit values are the median values of the posterior distribution, with the 1σ uncertainty given by the 16th and 84th percentiles. The best-fit values with 1σ lower limits are indicated by < when the posterior distribution is truncated at the edge of the prior range.

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