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Electric Mars: A large transâ terminator electric potential drop on closed magnetic field lines above Utopia Planitia
dc.contributor.authorCollinson, Glyn
dc.contributor.authorMitchell, David
dc.contributor.authorXu, Shaosui
dc.contributor.authorGlocer, Alex
dc.contributor.authorGrebowsky, Joseph
dc.contributor.authorHara, Takuya
dc.contributor.authorLillis, Robert
dc.contributor.authorEspley, Jared
dc.contributor.authorMazelle, Christian
dc.contributor.authorSauvaud, Jean‐andré
dc.contributor.authorFedorov, Andrey
dc.contributor.authorLiemohn, Mike
dc.contributor.authorAndersson, Laila
dc.contributor.authorJakosky, Bruce
dc.date.accessioned2017-04-14T15:10:48Z
dc.date.available2018-04-02T18:03:24Zen
dc.date.issued2017-02
dc.identifier.citationCollinson, Glyn; Mitchell, David; Xu, Shaosui; Glocer, Alex; Grebowsky, Joseph; Hara, Takuya; Lillis, Robert; Espley, Jared; Mazelle, Christian; Sauvaud, Jean‐andré ; Fedorov, Andrey; Liemohn, Mike; Andersson, Laila; Jakosky, Bruce (2017). "Electric Mars: A large transâ terminator electric potential drop on closed magnetic field lines above Utopia Planitia." Journal of Geophysical Research: Space Physics 122(2): 2260-2271.
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/2027.42/136441
dc.description.abstractParallel electric fields and their associated electric potential structures play a crucial role in ionosphericâ magnetospheric interactions at any planet. Although there is abundant evidence that parallel electric fields play key roles in Martian ionospheric outflow and auroral electron acceleration, the fields themselves are challenging to directly measure due to their relatively weak nature. Using measurements by the Solar Wind Electron Analyzer instrument aboard the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) Mars Scout, we present the discovery and measurement of a substantial (ΦMars=7.7 ± 0.6 V) parallel electric potential drop on closed magnetic field lines spanning the terminator from day to night above the great impact basin of Utopia Planitia, a region largely free of crustal magnetic fields. A survey of the previous 26 orbits passing over a range of longitudes revealed similar signatures on seven orbits, with a mean potential drop (ΦMars) of 10.9 ± 0.8 V, suggestive that although transâ terminator electric fields of comparable strength are not ubiquitous, they may be common, at least at these northerly latitudes.Key PointsWe report the discovery of a substantial parallel electric potential drop on closed dayâ toâ night magnetic field lines at MarsAlthough transâ terminator electric fields are not ubiquitous, they may be common in the northern Martian hemisphereObservations are consistent with a transient or localized phenomenon and may be associated with magnetic crustal field remanents
dc.publisherJohn Wiley & Sons, Ltd
dc.subject.otherelectric fields
dc.subject.otherMars
dc.subject.otherMAVEN
dc.subject.otherpolarization electric field
dc.titleElectric Mars: A large transâ terminator electric potential drop on closed magnetic field lines above Utopia Planitia
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelAstronomy and Astrophysics
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136441/1/jgra53178_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136441/2/jgra53178.pdf
dc.identifier.doi10.1002/2016JA023589
dc.identifier.sourceJournal of Geophysical Research: Space Physics
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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