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The four HII regions in the Sgr A East complex: A, B, C, and D, represent evidence of recent massive star formation in the central ten parsecs. Using Paschen-alpha images taken with HST and 8.4 GHz VL...
Hii regions in ngc 5055. ii. physical properties。
From Ultracompact to Extended HII Regions：Cloud Gravity and Stellar Motion
HII Regions Cloud Gravity Stellar Motion
2009/6/16
From Ultracompact to Extended HII Regions：Cloud Gravity and Stellar Motion。