Absolute values of the sky-projected orbital obliquity angles of close-in exoplanets (with mass 0.3 M_Jup < M_p < 13 M_Jup and a/R_* < 25), as a function of the host star’s effective temperature. The planets are represented by circles, whose sizes are proportional to their mass. The error bars have been suppressed for clarity. Colour indicates their equilibrium temperature. The grey zone is intended to discriminate two different populations of hot Jupiters, according to several authors (e.g. Winn et al. 2010; Albrecht et al. 2012). The planets surrounded by the green circles are those examined in this work, except for HAT-P-26 b. The other data are taken from TEPCat in February 2022.