On the spectrum of neutral oxygen in the Orion nebula

Images of the Orion Nebula in radiation of the 0 1 permitted lines are shown to have a unique filamentary structure not apparent in the [0 1] X6300 or other nebular lines. High-resolution profiles for these same lines are also presented. The 0 1 X8446 structure is explained in terms of the L resonance with the oxygen 2 3P-2 3D transition. The absence of such filamentary structure in Ha, produced also by L decay, is hypothesized to be the result of a concentration of solid particles in the transition H ii-H I region of high density where fluctuations of the 0 1 X8446 emission originate. headings: line formation - Orion Nebula