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Fig. 1.


Comparison of the various samples of BCGs found in the literature, considering the redshift range, the number of galaxies analyzed, and the type of data used. Only samples with at least 20 objects are represented here. Cerulo et al. (2019) with a sample of 74 275 BCGs is not represented here for reasons of legibility. The samples represented in black use ground-based telescope data, space-based data excluding HST, or a mix of ground-based and space-based data, while those in red only use HST data. Our initial sample is represented by the red and green dashed line, and our final BCG sample is in green (see Sect. 4).

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