Baryon fractions computed at as a function of mass. The baryon fraction does not show any dependence with respect to the mass at this high z. Black points represent the baryon fraction computed using the hydrostatic mass profiles at . The grey points represent the baryon fractions published in Bartalucci et al. (2017), computed using the . Gas masses were computed using the gas mass profiles derived from the combined density profiles. We used the stellar masses published in Chiu et al. (2016); stellar mass for SPT–CL J2146–4633 is not available. The yellow shaded area represents the baryon fraction published in Planck Collaboration XIII (2016).