We present high angular resolution images of both NHa (1, 1) and (2,2) lines toward NGC 7538 IRS 1. The density and velocity-position plots have beenused to study the interaction among the outflows, winds and their environment. Forthe first time we have found an expanding half-shell of molecular gas around theHII region associated with IRS 1, which may be produced by the interaction of thebipolar outflows and the winds originating in IRS 1-3, and optical HII region NGC7538 with ambient molecular gas.
展开▼
