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The importance of new chemical sources for the hot oxygen geocorona
Gérard, Jean-Claude; Richards, P. G.; Shematovich, V. I. et al.
1995In Geophysical Research Letters, 22, p. 279-282
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Keywords :
ATMOSPHERIC MODELS; EXOSPHERE; EXOTHERMIC REACTIONS; GEOCORONAL EMISSIONS; MONTE CARLO METHOD; OXYGEN ATOMS; STOCHASTIC PROCESSES; THERMOSPHERE; BOLTZMANN TRANSPORT EQUATION; COMPUTERIZED SIMULATION; MOLECULAR IONS; RECOMBINATION REACTIONS
Abstract :
[en] Exothermic reactions involving metastable neutrals and ions were recently proposed as sources of hot oxygen atoms in addition to the classical O2(+) and NO(+) dissociative recombination. The Boltzmann equations for thermal and nonthermal populations of O atoms are solved with Monte Carlo stochastic simulation method. It is shown that the calculated energy distribution functions of O atoms are significantly in nonequilibrium in the transition region between the thermosphere and the exosphere. It is found that the inclusion of additional sources leads to stronger disturbances of the energy distribution function and, as a consequence, increases the nonthermal fraction of hot O atoms. The variation of the vertical distribution of hot O between solar maximum and minimum conditions is also evaluated and shows good agreement with the available experimental evidence.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Richards, P. G.;  Univ. de Liege, Belgium
Shematovich, V. I.;  , US
Bisikalo, D. V.;  Inst. of Astronomy of the Academy of Sciences, Moscow, Russia
Language :
English
Title :
The importance of new chemical sources for the hot oxygen geocorona
Publication date :
01 February 1995
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
Volume :
22
Pages :
279-282
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 October 2009

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