First measurements of electron vorticity in the foreshock and solar wind

被引：7

作者：

Gurgiolo, C. ^{[1
]}

Goldstein, M. L. ^{[2
]}

Vinas, A. F. ^{[2
]}

Fazakerley, A. N. ^{[3
]}

机构：

[1] Bitterroot Basic Res, Hamilton, MT USA

[2] NASA, Goddard Space Flight Ctr, Geospace Sci Lab, Greenbelt, MD 20771 USA

[3] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary Dorking RH5 6NT, Surrey, England

来源：

ANNALES GEOPHYSICAE | 2010年 / 28卷 / 12期

关键词：

Interplanetary physics; Plasma waves and turbulence; Solar wind plasma; Instruments and techniques; NORTH-SOUTH FLOWS; AU;

D O I：

10.5194/angeo-28-2187-2010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe the methodology used to set up and compute spatial derivatives of the electron moments using data acquired by the Plasma Electron And Current Experiment (PEACE) from the four Cluster spacecraft. The results are used to investigate electron vorticity in the fore-shock. We find that much of the measured vorticity, under nominal conditions, appears to be caused by changes in the flow direction of the return (either reflected or leakage from the magnetosheath) and strahl electron populations as they couple to changes in the magnetic field orientation. This in turn results in deflections in the total bulk velocity producing the measured vorticity.

引用

页码：2187 / 2200

页数：14

共 28 条

[1] North-south flows at 47 AU: A heliospheric vortex street? [J].