Measured rotation curves – the circular velocity as a function of radius vcirc(R) – of the KiDS-bright isolated lens sample, divided into four stellar mass bins. The mean galaxy mass (stars+cold gas) of the lenses is shown at the top of each panel. The light blue shaded region indicates the radii corresponding to , where the uncertainty in the photometric KiDS redshifts can affect the isolated lens selection (see Appendix A). The black points (with 1σ error bars) show the result calculated using the SIS assumption, while the blue points (with error bars representing the 16th and 84th percentile of the fits) show the result from the more sophisticated PPL method. Our measurements are consistent between the two methods, and also with the rotation curves from SPARC (all data as the blue 2D histogram, the mean as red squares).
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