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Fig. 2

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Left: overlay of the 12CO contours (white, apart from clouds in the tail marked in black) on a greyscale, overexposed optical R-band image (Mazzarella & Boroson 1993). The dashed curve marks the edge of the OVRO primary beam (from Aalto & Hüttemeister 2000). Right: integrated 13CO 1–0 line emission in greyscale overlaid on a 12CO contour map smoothed to the 13CO resolution of 4''̣5. The greyscale range is 0.9–2.0 Jy kms-1 beam-1. The CO contours are 5.3  ×  (1, 2, 3, 4, 5, 6, 7, 8) Jy kms-1beam-1 (starting at 6σ). Cross indicate position of 1.4 GHz radio continuum peak (as in Fig. 1).

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