Fig. 4: 3D iso-surface rendering of position–velocity cuts for [CII] and CO 1 → 0 emission over the entire area observed in [CII].
From: Ionized carbon as a tracer of the assembly of interstellar clouds
![Fig. 4: 3D iso-surface rendering of position–velocity cuts for [CII] and CO 1 → 0 emission over the entire area observed in [CII].](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41550-023-01901-5/MediaObjects/41550_2023_1901_Fig4_HTML.png?as=webp)
The x and y axes are offsets in arcmin from the central map position; the z axis is velocity in km s−1. The emission starts at the 5σ level for both tracers. The bright star-forming cloud DR21 and other dense molecular clouds are embedded in a large-scale cloud structure only visible in [CII] (dark blue). An interactive version of these plots is found at https://astro.uni-koeln.de/stutzki/research/feedback/animations.
