Peking University, P.R. China
CO mapping were made toward WR Star 136, 149, 152, 153 (HD211853) and 157 using the 13.7 m telescope of Purple Mountain Observatory. Combining infrared and radio data, interaction of the center stars and their environments were investigated, including effect manifestations on gas region morphology, parameters, structure as well as status and spatial distribution of stellar objects.
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