Results of retrieval investigating the dayside atmosphere of TOI-2109b. Corner plot: posterior distributions and correlations between the atmospheric parameters. The dashed vertical lines in the posterior distributions denote the median and 1σ intervals (16th, 50th, and 84th percentiles) for the bounded parameters. For parameters with lower limits, we report the 2σ intervals (5th percentiles). We note that in addition to the free parameters of the retrieval, the present figure also includes log p₂, which is calculated as the sum of the free parameters log p₁ and dp. Top inset panel: examples of the T -p profiles sampled by the MCMC analysis. Bottom inset panel: median temperature curve with uncertainty intervals.