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Fig. 7

image

Peak brightness temperature of CO(4–3) (left panels) and CO(6–5) (right panels) estimated from the CO column density derived by using Tex under the assumption of η = 0.5 (upper panels) and 0.1 (lower panels) for all CO lines against observed TB (20′′ resolution). Blue lines indicate the case where the estimated and observed TB is the same.

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