σ_v − R plot. M83 XUV disk clouds and clumps are in blue (and the blue arrows are the upper limits in radius). The clouds have the largest radii, followed by the Level A and then the Level B clumps. The reference points in the background are for the Milky Way’s inner disk (Solomon et al. 1987), outer disk (r_gal∼12–14 kpc; Sun et al. 2017), and far outer disk (∼14–22 kpc; Sun et al. 2015), the LMC and SMC (Wong et al. 2011; Bolatto et al. 2008), and WLM (Rubio et al. 2015). The solid line is a fit to the inner disk clouds (Solomon et al. 1987).