Open Access
This article is a note for:
[https://doi.org/10.1051/0004-6361/201936377]


Fig. 6

image

Column density maps of 13CO (frame a) and C18O (frame b), and their ratio (frame c) normalised to the expected 13CO/C18O from Wilson & Rood (1994). Frame d: Excitation temperature of 12CO. Frame e: Integrated ratio. The sources s1454 (north clump) and s1446 (NGC 2264 H) are indicated in each frame. The ellipses in frame a show the GCC sources with the same colour code as in Fig. 2: red for protostellar, blue for starless, and black for undetermined. A scale bar is shown in frame c. The structures named “the arc” and “the bar” are shown in frame e.

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