Model predictions for radial profiles of line properties, which are those measurements in spectra collected in circularly concentric annuli of equal width (21 kpc). The figure shows the sample variance of the centroid shift (left panel), the sample average of the line broadening (middle panel), and the sample variance of the line broadening. The injection scale is L_inj = 100 kpc, and the emissivity model is a spherical β = 2/3 model with core radii indicated in legend. Shaded rectangles indicate bin widths (horizontally) and numerical uncertainties (vertically).