IRX–β plane for quasars. The data corresponding to the high-z galaxies by Capak et al. (2015) reanalyzed by Barišić et al. (2017) are shown (black squares), along with their 1σ errors, superimposed on the HerS/SDSS quasars (filled dots). The empirical IRX-to-β relations by Pettini et al. (1998, dashed lines) and Meurer et al. (1999, solid lines) computed for values of βint from −2.5 to −1 are also reported. Left panel: HerS/SDSS quasars segregated in logarithmic MBH. Right panel: HerS/SDSS quasars segregated in logarithmic Mgas. Only HerS/SDSS objects with measured MBH and Mgas are used.
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