Spacecraft measurements constraining the spatial extent of a magnetopause reconnection X line

Show full item record



Permalink

http://hdl.handle.net/10138/224166

Citation

Walsh , B M , Komar , C M & Pfau-Kempf , Y 2017 , ' Spacecraft measurements constraining the spatial extent of a magnetopause reconnection X line ' , Geophysical Research Letters , vol. 44 , no. 7 , pp. 3038-3046 . https://doi.org/10.1002/2017GL073379

Title: Spacecraft measurements constraining the spatial extent of a magnetopause reconnection X line
Author: Walsh, B. M.; Komar, C. M.; Pfau-Kempf, Y.
Contributor organization: Department of Physics
Space Physics Research Group
Date: 2017-04-16
Language: eng
Number of pages: 9
Belongs to series: Geophysical Research Letters
ISSN: 0094-8276
DOI: https://doi.org/10.1002/2017GL073379
URI: http://hdl.handle.net/10138/224166
Abstract: Multispacecraft measurements from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission are used to probe the spatial extent of an X line at the dayside magnetopause. A case study from 21 April 2014 is presented where two THEMIS spacecraft have a near-simultaneous encounter with the equatorial dayside magnetopause separated by 3.9 Earth radii. Both spacecraft observe similar steady inflow conditions with southward interplanetary magnetic field and a high magnetic shear angle at the magnetopause (133 degrees) boundary. One spacecraft observes clear fluid and kinetic signatures of active magnetic reconnection, while the other spacecraft does not observe reconnection. The predicted location of reconnection across the magnetopause is found using several theoretical models and a Block Adaptive Tree Solarwind Roe-type Upwind Scheme (BATS-R-US) MHD simulation. Each model predicts a continuous X line passing close to the two spacecraft, suggesting both would observe reconnection, if active. Using the constraints of the multipoint measurements, the extent or length L of the reconnection is estimated to be 2.4L <5.2h in local time or 6L<14 R-E.
Subject: Reconnection
Magnetopause
FLUX-TRANSFER EVENTS
INTERACTION OFMAGNETIC RECONNECTION
KELVIN-HELMHOLTZ MODES
MAGNETIC RECONNECTION
DAYSIDE MAGNETOPAUSE
EARTHS MAGNETOPAUSE
SOUTHWARD IMF
LOCAL TIME
CUSP
SIMULATIONS
114 Physical sciences
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: submittedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
Walsh_et_al_2017_Geophysical_Research_Letters.pdf 1.824Mb PDF View/Open
Walsh2.pdf 1.857Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record