Large-field CO (1–0) observations towards the Galactic historical supernova remnants: Shocked molecular clouds towards the Crab Nebula

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Fig. 1

Intensity image of the MWISP ¹²CO (1–0) emission, integrated in the velocity range −2 to 6 km s⁻¹. The dashed grey square shows the area of deep mapping observations. The red ellipse shows the position and size (7′ × 5′) of the Crab Nebula. The dashed blue arrow lines show the routings of the PV diagrams in Figure 2.

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