Reference : 2D-photochemical model for forbidden oxygen line emission for comet 1P/Halley
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/201619
2D-photochemical model for forbidden oxygen line emission for comet 1P/Halley
English
Cessateur, G. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium]
De Keyser, J. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium]
Maggiolo, R. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium]
Rubin, M. [Physikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, Switzerland]
Gronoff, G. [Science Directorate, Chemistry and Dynamics Branch, NASA Langley Research Center, Hampton, Virginia USA; SSAI, Hampton, Virginia USA]
Gibbons, A. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium; Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles, Av. F. D. Roosevelt 50, B-1050 Brussels, Belgium]
Jehin, Emmanuel mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Dhooghe, F. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium]
Gunell, H. [Space Physics Division, Royal Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180 Brussels, Belgium]
Vaeck, N. [Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles, Av. F. D. Roosevelt 50, B-1050 Brussels, Belgium]
Loreau, J. [Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles, Av. F. D. Roosevelt 50, B-1050 Brussels, Belgium)]
1-Aug-2016
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
Yes (verified by ORBi)
International
0035-8711
1365-2966
Oxford
United Kingdom
[en] comets: general ; methods: numerical ; molecular processes
[en] We present here a 2D-model of photochemistry for computing the production and loss mechanisms of the O([SUP]1[/SUP]S) and O([SUP]1[/SUP]D) states, which are responsible for the emission lines at 577.7 nm, 630 nm, and 636.4 nm, in case of the comet 1P/Halley. The presence of O[SUB]2[/SUB] within cometary atmospheres, measured by the in-situ ROSETTA and GIOTTO missions, necessitates a revision of the usual photochemical models. Indeed, the photodissociation of molecular oxygen also leads to a significant production of oxygen in excited electronic states. In order to correctly model the solar UV flux absorption, we consider here a 2D configuration. While the green to red-doublet ratio is not affected by the solar UV flux absorption, estimates of the red-doublet and green lines emissions are, however, overestimated by a factor of two in the 1D model compared to the 2D model. Considering a spherical symmetry, emission maps can be deduced from the 2D model in order to be directly compared to ground and/or in-situ observations.
Professionals
http://hdl.handle.net/2268/201619
10.1093/mnras/stw2150
http://adsabs.harvard.edu/abs/2016MNRAS.tmp.1266C

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