Fitted centers of the [O III]5007 Å emission line spatial profiles, measured in arcsec (left y-axis) and parsec (right y-axis), as a function of velocity. The black dashed vertical and horizontal lines mark the zero point of both axes. The blue dashed lines mark the error-weighted mean position of the [O III] spatial profiles at v < 250 km s⁻¹ and at v > 250 km s⁻¹, and the red solid line marks their average. The negative values along the y-axis indicate the direction pointing toward the companion galaxy to the west.