Examples of the kν coefficient corresponding to the 12CO transitions with J = 2–1, 6–5, 10–9 and 16–15 as a function of temperature in six different physical conditions, with varying ϵ, n and . Some of the transitions have been scaled up or down by the specified factors for displaying purposes. The non-linear dependance on the density n can easily be seen here, as well as the almost linear dependance on the product . The value of ϵ, on the other hand, affects the kν coefficient only slightly.
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