Fig. 1
Composite image representing the velocity structure present in the C18O (J = 1−0) cube. Each velocity channel is directly encoded as a hue, and the final image is obtained by additive colour synthesis. The brightest points correspond to 4 K in main beam temperature. The labels indicate, (1) the Horsehead Nebula, (2) NGC 2023, (3) NGC 2024 (the Flame Nebula), (4) the Flame filament, and (5) the Hummingbird filament. The spatial and kinematic complexity of the cloud appear clearly in particular in regions such as the north-eastern part of the cloud or around NGC 2023.
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