Comparison of the BTFR to hydrodynamic simulations in ΛCDM. Blue datapoints with errorbars are the galaxies in the α.btfr sample (same as in Fig. 2). The orange squares are mock galaxies from the hydrodynamic simulation of Piontek & Steinmetz (2011), while the green squares are mock galaxies produced in a set of hydrodynamic simulations by Governato et al. (2012, G12), Brooks & Zolotov (2014, BZ14), and Christensen et al. (2014, C14). Note that rotational velocities for the G12/BZ14/C14 mock galaxies are reported in the same way as for the α.btfr galaxies, i.e., in terms of the linewidth of their simulated HI profiles.
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