Channel maps of the H2CO 303 − 202 emission. Black contour levels for the molecular line emission (on a scale) are from 0.16 K (2σ) in s.pdf of 0.16 K. Velocity channels range from −27 to +81 km s-1in s.pdf of 2 km s-1. The central velocities of the channel maps are shown at the top of each panel. The wedge at the side shows the intensity scale of the line emission. The beam size of 30″ is shown in the bottom-left corner.
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