Fig. 17
Galactic longitude–velocity diagram of the CMZ in HNC, using the 3 mm line data presented in Jones et al. (2012). To make the ℓ–v diagram, the emission was integrated between Galactic latitudes b = − 0.29 and 0.21. The approximate positions and velocities of G0.253+0.016, Sgr A and Sgr B2 are shown, and Arms I and II from Sofue (1995) are labelled.
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