Cometary HII regions of DR21

We present deep Very Large Array H66{alpha} radio recombination line (RRL) observations of the two cometary HII regions in DR 21. With these sensitive data, we test the "hybrid"...本研究报道了针对DR 21中两个彗星状电离氢区（HII region）的甚大阵（Very Large Array，VLA）H66α射电复合线（radio recombination line, RRL）深场观测结果。依托这批高灵敏度观测数据，我们对"混合式（hybrid）……"开展检验。