Distributions of spectral index and peak flux densities of HII region candidates in GLOSTAR B-configuration. Top panel: the histogram of the measured spectral index for the total 390 H II region candidates of GLOSTAR B-configuration. The hatched histogram represents the 183 candidates with σ_α < 0.2. The bin size is 0.25. The 183 candidates are divided into two subsamples: (1) 120 H II regions with α and (2) 63 H II regions with α > −0.1, indicating non-thermal and thermal emissions, respectively. Bottom panel: the cumulative distribution of the peak flux densities for the α < −0.1 sample (orange line) and the α > −0.1 sample (black line). The orange and black vertical dashed lines show the mean values of 9.5 mJy beam⁻¹ and 31.6 mJy beam⁻¹ for the two subsamples, respectively.