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Fig. 2


The λeϵe diagram considering 200 random projections in each remnant and in the original S0 galaxies, compared with the distributions of fast- and slow-rotator S0s from the ATLAS3D sample (yellow and red galaxy-like symbols respectively, see E11). Left panel: for all models, independently of their spin-orbit coupling. The projections of the original S0 galaxies are plotted with black points, blue points correspond to the remnants of the experiments with an original S0b primary galaxy, and green ones to those with an original primary S0c. Stars indicate the location of each remnant in an edge-on view (blue and green filled stars for the original S0b and S0c galaxies; blue and green empty stars for the remnants of the models with an original S0b and S0c galaxy, respectively). The stars marked with a cross correspond to retrograde models. Right panel: the same as in the left panel, but distinguishing between the projections of prograde and retrograde models. The prograde remnants are plotted with points (light blue for those with an original S0b galaxy; light green for the one with an original S0c). The retrogrades are symbolized with crosses (dark blue for original S0b primary galaxies; olive green for the one with an original primary S0c). Black solid line: theoretical relation of isotropic oblate systems viewed edge-on from Binney (2005). Green dashed line: empirical limit isolating fast from slow rotators defined by E11 (equivalent to 0.31). Black dotted line: location of galaxies with an intrinsic ellipticity ϵ = 0.82 when going from a face-on to an edge-on view, to show the effects of inclination. Magenta solid line: edge-on view of ellipsoidal galaxies integrated within r = Reff,glx for an anisotropy β = 0.65ϵ (for more details, see E11). The error bars on the left upper corner of each frame represent the typical errors in both axes (mean values of all projections). (This figure is available in color in electronic form.)

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