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Strongly noncircular outer stellar disks have been found in two unbarred SA0galaxies by analyzing spectroscopic data on the rotation of stars andphotometric data on the shape and orientation of the isophotes. In NGC 502, theoval distortion of the disk is manifested as two elliptical rings, the innerand the outer ones, covering wide radial zones between the bulge and the diskand at the outer edge of the stellar disk. Such a structure may be aconsequence of the so-called "dry" minor merger - multiple accretion ofgas-free satellites. In NGC 5485, the kinematical major axis does not coincidewith the orientation of isophotes in the disk-dominated region, and for thisgalaxy the conclusion about its global triaxial structure is unavoidable.

Noncircular Outer Disks in Unbarred S0 Galaxies: NGC 502 and NGC 5485