Violin plot of the line-of-sight velocity residuals of individual components with respect to the systemic radial velocity: Δv = v − 2035 km s⁻¹, where 2035 km s⁻¹ is our adopted systemic velocity. From top to bottom: Residuals in [O III] (high-ionization), [S II] (low-ionization), Hα (Balmer emission), H I, and the stellar component, measured inside the μ₀ + 2.0 isophote. Each violin shows the kernel-density estimate (vertical width ∝ probability), while the gray line marks the median, the black line indicates the mean, and the dashed vertical line highlights Δv = 0. Distributions were computed from the velocity maps in Fig. 4.