Auroral recombination of N and O: A possible source for emission in the γ and δ bands of NO期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Auroral recombination of N and O: A possible source for emission in the γ and δ bands of NO

Authors:	Steven C Wofsy Michael B McElroy

Institution:	Center for Earth and Planetary Physics, Harvard University, Cambridge, MA 02138, U.S.A.

Abstract:	Radiative recombination of N and O provides a significant source for auroral emission in the γ and δ bands of NO with selective population of vibrational levels in the A²Σ⁺ and C²Π states. This mechanism may account for emissions detected near 2150 Å. Models are derived for the auroral ionosphere and include estimates for the concentrations of N and NO. The concentration of NO is estimated to have a value of about 10⁸ cm^?1 near 140 km in an IBC III aurora. The corresponding density for N is about 5 × 10⁷cm^?3 and the concentration ratio $NO^{+} O_{2}^{+}$ has a value of about 5.5.

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