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Record Details

Record 1 of 121361
MAVEN Observation of an Obliquely Propagating Low-Frequency Wave Upstream of Mars
External Online Source: doi:10.1002/2015JA022306
Author and Affiliation:
Ruhunusiri, Suranga(Iowa Univ., Dept. of Physics and Astronomy, Iowa City, IA, United States)
Halekas, J. S.(Iowa Univ., Dept. of Physics and Astronomy, Iowa City, IA, United States)
Connerney, J. E. P.(Adnet Systems, Inc., Dept. of Physics and Astronomy, Greenbelt, MD, United States)
Espley, J. R.(NASA Goddard Space Flight Center, Greenbelt, MD United States)
McFadden, J. P.(California Univ., Space Sciences Lab. , Berkeley, CA, United States)
Mazelle, C.(Centre National de la Recherche Scientifique, IRAP, Toulouse, France)
Brain, D.(Colorado Univ., Lab. for Atmospheric and Space Physics, Boulder, CO, United States)
Collinson, G.(Adnet Systems, Inc., Dept. of Physics and Astronomy, Greenbelt, MD, United States)
Harada, Y.(California Univ., Space Sciences Lab. , Berkeley, CA, United States)
Larson, D. E.(California Univ., Space Sciences Lab. , Berkeley, CA, United States) Show more authors
Abstract: We report Mars Atmosphere and Volatile EvolutioN (MAVEN) mission observations of a large amplitude low-frequency plasma wave that propagated oblique to the ambient magnetic field upstream of Mars along with a non-solar-wind plasma component that had a flow velocity perpendicular to the magnetic field. We consider nine possibilities for this wave that include various combinations of its propagation direction, polarization in the solar wind frame, and ion source responsible for its generation. Using the observed wave parameters and the measured plasma parameters as constraints, we uniquely identify the wave by systematically discarding these possibilities. We determine that the wave is a right-hand polarized wave that propagated upstream in the solar wind frame. We find two possibilities for the ion source that can be responsible for this wave generation. They are either newly born pickup protons or reflected solar wind protons from the bow shock.We determine that the observed non-solar-wind component is not responsible for the wave generation, and it is likely that the non-solar-wind component was merely perturbed by the passage of the wave.
Publication Date: Mar 29, 2016
Document ID:
20170002350
(Acquired Mar 21, 2017)
Subject Category: SOLAR PHYSICS; ASTROPHYSICS
Report/Patent Number: GSFC-E-DAA-TN40132
Document Type: Journal Article
Publication Information: Journal of Geophysical Research: Space Physics (ISSN 2169-9380; e-ISSN 2169-9402); Volume 121; Issue 3; 2374-2389
Publisher Information: WILEY
Contract/Grant/Task Num: NNG12PL17C; NNG11PL10A
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 16p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: MARS ATMOSPHERE; LOW FREQUENCIES; PLASMA WAVES; SHOCK WAVES; SOLAR WIND; WAVE GENERATION; MARS (PLANET); PLANETARY MAGNETIC FIELDS; UPSTREAM; ION SOURCES; PLASMA INTERACTIONS; SOLAR PLANETARY INTERACTIONS; MAGNETOSPHERIC PROTON DENSITY; MAGNETOSPHERIC ION DENSITY
Other Descriptors: MAVEN; OBLIQUELY; LOW FREQUENCY WAVE; UPSTREAM; MARS; SOLAR WIND FRAME; PLAMA
Availability Source: Other Sources
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