Effect of the planet shine on the corona : Application to the Martian hot oxygen

Jean-Yves Chaufray 1 Justin Deighan 2 A. Ian F. Stewart 2 Nicholas Schneider 2 John Clarke 3 François Leblanc 1 Bruce Jakosky 2
1 HEPPI - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
2 LASP - Laboratory for Atmospheric and Space Physics [Boulder]
3 CSP - Center for Space Physics [Boston]
Abstract : Systematic observations of the Martian hot oxygen corona by IUVS on MAVEN can be used to constrain estimates of the current neutral oxygen escape rate. In this paper, we investigate the effect of the photons emitted from the thermosphere and lower exosphere on the emissivity of the hot oxygen corona at 130.4 nm. We compare this source of illumination, generally neglected, to the direct solar illumination used to convert the O I 130.4 triplet brightness into line-of-sight column density. This study is performed using a radiative transfer model with two maxwellian oxygen populations, assuming spherical symmetry for the cold and hot oxygen densities. Contribution to the corona from the illumination of the exosphere by the sunlit atmosphere depends on the amount of cold oxygen, and varies with altitude and solar zenith angle. An analytic formulation to take into account variations of this effect with respect to the hot oxygen kinetic temperature is proposed. The effect of the atmosphere sunlit should be general and occur on other planets for other very optically thick resonance lines.
Keywords : Mars Exosphere Airglow
Document type :
Journal articles
Liste complète des métadonnées

Cited literature [29 references]  Display  Hide  Download
https://hal-insu.archives-ouvertes.fr/insu-01389787
Contributor : Catherine Cardon <>
Submitted on : Monday, January 16, 2017 - 4:33:11 PM
Last modification on : Friday, April 5, 2019 - 8:23:37 PM
Document(s) archivé(s) le : Monday, April 17, 2017 - 3:16:13 PM

File

jgra53066.pdf
Publisher files allowed on an open archive

Identifiers

Collections

UPMC | LATMOS | INSU | UVSQ | UNIV-PARIS-SACLAY | SORBONNE-UNIVERSITE | SU-SCIENCES

Citation

Jean-Yves Chaufray, Justin Deighan, A. Ian F. Stewart, Nicholas Schneider, John Clarke, et al.. Effect of the planet shine on the corona : Application to the Martian hot oxygen. Journal of Geophysical Research : Space Physics, American Geophysical Union/Wiley, 2016, 121 (11), pp.11,413-11,421. 〈10.1002/2016JA023273〉. 〈insu-01389787〉

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

156

Files downloads

54

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD