A study of the hot molecular gas associated with ultracompact ionized regions.

摘要

The first high resolution observation of the recently discovered NH;Our VLA study of four objects in the NH;A detailed study of the massive star forming region G9.62 + 0.19 in the CH;The results of a high resolution survey toward 20 ultracompact HII regions in the 22 GHz water maser line show that strong maser emission is usually located in front of the ionized arc in the case of the cometary class of ultracompact HII regions. Also, in all cases where high resolution ammonia maps exist, the water masers are coincident with the hot, dense molecular clumps.