Fig. 3

The OMC-1 core 13CO J = 3−2 integrated intensity [+5, +15] km s-1 image overlaid with the C18O J = 3−2 [+4, +12] km s-1 contours running from 24 to 80 K km s-1 in steps of 8 K km s-1. The 13CO J = −2 (black) and C18O J = 3−2 (red) spectra are shown for Orion BN, Orion South, Orion Bar, and Orion East at the same positions as in Fig. 1. The black stars mark the positions of the five Trapezium stars. The beam size of 211 is shown at the bottom left of the image.
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