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  Impact of Martian crustal magnetic field on the ion escape

Dubinin, E. M., Fränz, M., Pätzold, M., Woch, J., McFadden, J., Fan, K., et al. (2020). Impact of Martian crustal magnetic field on the ion escape. Journal of Geophysical Research: Space Physics, e2020JA028010. doi:10.1029/2020JA028010.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-20CA-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-5AA0-F
Genre: Journal Article

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 Creators:
Dubinin, E. M.1, Author              
Fränz, Markus1, Author              
Pätzold, M., Author
Woch, Joachim2, Author              
McFadden, J., Author
Fan, K., Author
Wei, Y., Author
Tsareva, O., Author
Zelenyi, L., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              
2Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: Based on the Mars Atmosphere and Volatile EvolutioN (MAVEN) observations we have analyzed the role of the crustal magnetic field on ion loss driven by the direct interaction of the solar wind with the Mars ionosphere. Crustal magnetic fields significantly attenuate the ion ionospheric motions and raise the flux of returning ions. On the other hand, since the ion densities in the ionosphere with strong crustal field are significantly higher than in the ionosphere with a weak crustal magnetic field, the net escape fluxes from the ionosphere with the crustal sources remain vital. The crustal magnetic field also leads to the expansion of the ionosphere and increase of the area exposed to solar wind. As a result, fluxes from higher altitudes essentially contribute to the flow pattern in Martian tail producing an excess of ion loss rate (~15%) through the southern part of the tail. Thus effects of inhibition and enhancement of the escape rate by the crustal magnetic field at Mars operate in competition producing a minor influence on the total ion loss.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2020JA028010
 Degree: -

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Title: Journal of Geophysical Research: Space Physics
  Other : JGR-A
  Abbreviation : J. Geophys. Res. - A
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: - Sequence Number: e2020JA028010 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264