Newly identified H II regions G139.2−3.0, G139.9−2.0 and G172.3+1.9. Hα emission overlaid by Urumqi λ6 cm total intensity contours are shown in the upper panel. The image quality of the south-east part of G172.3+1.9 is not good; however, correlation can be clearly recognised in the north-west part. TT-plot results are displayed in the lower panels.
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