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Fig. 2


Comparison of CO estimates from Planck Type 3 CO maps and ground-based observations. Upper frame compares the sum of 12CO(2–1) and 13 CO(2–1) values of 56 SMT maps to Planck CO estimates for the assumed line ratio of (2−1)/(1−0) = 0.5. Lower frame shows comparison with CO(1–0) observations from the PMO telescope, with data at 7 resolution sampled at 3 steps. Each colour and symbol combination corresponds to one of 17 fields. Solid lines show the one-to-one relations, and dotted lines correspond to slopes different by ±30%.

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