Low-frequency waves in the Martian magnetosphere and their response to upstream solar wind driving conditions

Suranga Ruhunusiri; J. S. Halekas; J. E. P. Connerney; J. R. Espley; J. P. McFadden; D. E. Larson; D. L. Mitchell; C. Mazelle; B. M. Jakosky

doi:10.1002/2015GL064968

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Low-frequency waves in the Martian magnetosphere and their response to upstream solar wind driving conditions

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Low-frequency waves in the Martian magnetosphere and their response to upstream solar wind driving conditions

Suranga Ruhunusiri, J. S. Halekas, J. E. P. Connerney, J. R. Espley, J. P. McFadden, D. E. Larson, D. L. Mitchell, C. Mazelle and B. M. Jakosky

Geophysical research letters, Vol.42(21), pp.8917-8924

11/16/2015

DOI: 10.1002/2015GL064968

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Abstract

We characterize low-frequency plasma waves in the Martian magnetosphere and in the upstream region by using transport ratios. To compute the transport ratios, we use Mars Atmosphere and Volatile EvolutioN mission's (MAVEN) solar wind ion analyzer and suprathermal and thermal ion composition instrument measurements of the ion moments and the magnetometer measurements of the magnetic field. We find that the Alfvén waves are the most dominant wave mode in the upstream region and the magnetosheath. Fast waves are found frequently near the bow shock and the magnetic pileup boundary. Mirror and slow waves, on the other hand, occur much less frequently. We also find that the Alfvén and fast wave occurrences vary dominantly near the bow shock in response to the solar wind dynamic pressure.

magnetosphere

Mars

MAVEN

MHD

plasma

waves

Details

Title: Subtitle: Low-frequency waves in the Martian magnetosphere and their response to upstream solar wind driving conditions
Creators: Suranga Ruhunusiri - University of Iowa
J. S. Halekas - University of Iowa
J. E. P. Connerney - Goddard Space Flight Center
J. R. Espley - Goddard Space Flight Center
J. P. McFadden - University of California, Berkeley
D. E. Larson - University of California, Berkeley
D. L. Mitchell - Space Sciences Laboratory, University of California, California, Berkeley, USA
C. Mazelle - Institut de Recherche en Astrophysique et Planétologie
B. M. Jakosky - University of Colorado Boulder
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.42(21), pp.8917-8924
DOI: 10.1002/2015GL064968
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Blackwell Publishing Ltd
Number of pages: 8
Language: English
Date published: 11/16/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984429037002771

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