Figure 9.

Electron Cooling rates for CO₂ and CO at Mars. Log₁₀ of electron cooling rates (horizontal axis), as a function of altitude in the atmosphere of Mars, for CO₂ using the transfer rates of Morrison and Greene [1] (- - -), for rotational (J = 0 → 1) excitation of CO (· · ·), for CO(0 → 1) using the cross sections of Allan [8] (———) and Poparić et al. [7] (– – –), and for CO(0 → ν', ν' = 2 – 10) using the cross sections of Allan (——— –) and Poparić et al. (- · - · -).