Morphologically extracted 13CO spectrum vLSR comparison with dense-gas tracers. Colors and lines as in Figure 2. Left: velocity comparison for the N = 1165 BGPS V2 objects with a valid morphologically extracted 13CO spectrum and HCO(3–2) vLSR from Shirley et al. (2013). Right: velocity comparison for the N = 242 BGPS V2 objects with a valid morphologically extracted 13CO spectrum and NH3(1,1) vLSR from Dunham et al. (2011b).