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机译:Hot ammonia around young O-type stars II. JVLA imaging of highly excited metastable NH3 masers in W51-North
Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands;
Max Planck Inst Radioastron, D-53121 Bonn, Germany;
Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Mexico City 58089, DF, MexicoUS Naval Res Lab, Washington, DC 20375 USA;
masers; stars: formation; ISM: molecules; radio lines: ISM; ISM: individual objects: W51; ISM: clouds;