Bayesian-averaged posterior parameter distributions for each of the HR 8799 planets based on the group A ∩ B set of retrievals. In faint lines beneath the total posterior distribution are the individual contributions from different retrievals. The coloured dashed and dotted lines indicate the median and ±34.1% confidence regions respectively. The vertical grey lines indicate typical parameter values (e.g. solar metallicity and C/O) and serve as a visual reference for each parameter. For the planet mass, they indicate the dynamical mass estimate from Zurlo et al. (2022).