The Spatial Extent of Magnetopause Magnetic Reconnection From In Situ THEMIS Measurements

被引：5

作者：

Atz, Emil A. ^{[1
,2
]}

Walsh, Brian M. ^{[1
,2
]}

Broll, Jef M. ^{[3
]}

Zou, Ying ^{[4
]}

机构：

[1] Boston Univ, Coll Engn, Boston, MA 02215 USA

[2] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA

[3] Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM USA

[4] Univ Alabama, Huntsville, AL USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2022年 / 127卷 / 12期

基金：

美国国家科学基金会;

关键词：

magnetopause; reconnection; THEMIS; EARTHS MAGNETOPAUSE; PLASMA; LOCATION; SHEAR; ACCELERATION; DEPENDENCE; MOTION; FIELD;

D O I：

10.1029/2022JA030894

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Magnetic reconnection at the magnetopause has long been studied with multi-spacecraft observations. In this work, data from the five satellite THEMIS mission during the years of 2008-2010 are used to generate statistics regarding the spatial extent of magnetopause reconnection. The presence of a reconnecting magnetopause is determined with the Walen relation as two satellites cross the magnetopause simultaneously. In some cases both satellites measure reconnection whereas in others one satellite measures reconnection and the other does not. This study finds that two spacecraft are more likely to observe a contiguous reconnection region the closer they are spatially, and that reconnection is not always extended around the entire magnetopause. Plasma beta gradient drifts are investigated as a cause of local reconnection suppression. Spacecraft position along the magnetopause flanks is also investigated as a possible spatial limitation to reconnection due to changes in shear flow or boundary thickness.

引用

页数：13

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