Top: NGC 6334 central area σ versus flux diagram. Fluxes are in arbitrary units. The horizontal line is σ_m (see text). Bottom: the location of the zones identified by different colors on the σ− flux plot overlaid on the image. North is up and East is to the right. In this field 12% of the profiles show σ> 10 km s^-1. The positions where σ> 10 km s^-1 are underlined in cyan. In both panels, the points overlaid with square, lozenge and circle symbols belong to GUM 61, GUM 64b, and H ii 351.2+0.5 respectively.