Using the Institut de Radioastronomie Millmétrique 30 m telescope, we presented observations of N2H+J = 1−0, CCS JN = 87–76 and 77–66 lines toward a large sample of ultracompact H II regions (UC H IIs). Among our 88 UC H IIs, 87 and 33…
Using the Institut de Radioastronomie Millmétrique 30 m telescope, we presented observations of N2H+J = 1−0, CCS JN = 87–76 and 77–66 lines toward a large sample of ultracompact H II regions (UC H IIs). Among our 88 UC H IIs, 87 and 33…