Fig. 2. [Ne III ] map (contours) and 6.2 µm  Aromatic Infrared Band (AIB) map (grey scale). The grey scale corresponds to line intensities from 0.01 to 0.30 erg s^-1 cm^{- 2} sr^-1. The contours correspond to band intensities of 0.015 to 0.06 erg s^-1 cm^{- 2} sr^-1 by steps of 0.05. The cross is at the position of the O9.5V star  Ori A. The position of the hottest of the Trapezium stars ( Ori C) is also indicated, outside the observed field. The position of the SWS aperture in the direction of the H II  region is shown by a black cross.