= Rotation-anisotropy diagram
{title2=$v/\sigma\text{ versus }e$}
A <rotation-anisotropy diagram> compares ordered <rotation> divided by <velocity dispersion> with a <galaxy>'s flattening. An <oblate isotropic rotator> provides a reference curve. Falling below it can indicate anisotropic random support, but inclination, measurement apertures, and the definition of <rotation> change the interpretation. Intrinsic axis ratios and projected ellipticities are different observables.
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