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Systematic surveys of nearby early type galaxies (ETGs) using integral fieldunit spectrograph (IFU) data have revealed that galaxies can hide interestingstructures only visible through kinematic studies. As part of their pioneeringwork, the ATLAS3D team have shown that most morphologically elliptical galaxiesare centrally kinematically disk-like. Hence, while global morphology suggeststhat ellipticals are ellipsoidal/triaxial in shape, their central kinematicsmay be consistent with (inclined) oblate systems.  Here we study the Fast Rotator elliptical galaxy: NGC 4473. Using slitlets,we obtain galaxy light kinematics out to unprecedentedly large galactocentricradii (2.5 effective radii). While we confirm the IFU results in the centralregions, we find that at large galactocentric radii NGC 4473 exhibits akinematic transition. In the outskirts, we observe clear minor and major axisrotation, a tell-tale sign of triaxiality, which agrees well with the galaxy'sHubble type.  This outer "kinematically distinct halo" (KDH) may be expected fromsimulations of galaxy formation, and in this system contains around one-thirdof the stellar light. While this galaxy may be a special case, it suggestsfurther investigation of the outskirts of galaxies is needed to confirm the newparadigm of galaxy classification.

The SLUGGS Survey: outer triaxiality of the Fast Rotator elliptical NGC 4473