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We present new and archival Chandra X-ray Observatory observations ofX-shaped radio galaxies within z < 0.1 alongside a comparison sample of normaldouble-lobed FR I and II radio galaxies. By fitting elliptical distributions tothe observed diffuse hot X-ray emitting atmospheres, we find that theellipticity and the position angle of the hot gas follows that of the stellarlight distribution for radio galaxy hosts in general. Moreover, compared to thecontrol sample, we find a strong tendency for X-shaped morphology to beassociated with wings directed along the minor axis of the hot gasdistribution. Taken at face value, this result favors the hydrodynamic backflowmodels for the formation of X-shaped radio galaxies which naturally explain thegeometry; the merger-induced rapid reorientation models make no obviousprediction about orientation.

The Chandra View of Nearby X-shaped Radio Galaxies