Skip to Main content Skip to Navigation
Journal articles

Magnetic Reconnection on Dayside Crustal Magnetic Fields at Mars: MAVEN Observations

Abstract : The identification of magnetic reconnection on the dayside of Mars has been elusive owing to the lack of comprehensive plasma and field measurements. Here we present direct measurements of dayside in situ reconnection signatures by the comprehensive particles and fields package on board the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft over strong crustal magnetic fields in the southern hemisphere of Mars. During a crossing of a bifurcated current sheet consisting of northward and southward magnetic fields, MAVEN recorded (i) ionospheric photoelectrons trapped on closed magnetic field lines, (ii) Hall magnetic fields and a nonzero normal field with polarity consistent with a crossing northward of the X line, and (iii) northward Alfvénic ion jets. Dayside magnetic reconnection on crustal magnetic fields could control the global configuration and topology of the Martian magnetosphere and alter the ion escape pattern from the dayside ionosphere.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03678218
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Wednesday, May 25, 2022 - 1:18:59 PM
Last modification on : Wednesday, June 1, 2022 - 4:18:53 AM

File

Geophysical Research Letters -...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

y. Harada, J. S. Halekas, G. A. Dibraccio, S. Xu, J. Espley, et al.. Magnetic Reconnection on Dayside Crustal Magnetic Fields at Mars: MAVEN Observations. Geophysical Research Letters, 2018, 45, pp.4550-4558. ⟨10.1002/2018GL077281⟩. ⟨insu-03678218⟩

Share

Metrics

Record views

0

Files downloads

0