| Title: |
Guide field reconnection: exhaust structure and heating |
| Authors: |
Eastwood, J; Mistry, R; Phan, TD; Schwartz, SJ; Ergun, RE; Drake, JF; Oieroset, M; Stawarz, JE; Goldman, MV; Haggerty, C; Shay, MA; Burch, JL; Gershman, DJ; Giles, BL; LIndqvist, PA; Torbert, RB; Strangeway, RJ; Russell, CT |
| Contributors: |
Science and Technology Facilities Council (STFC) |
| Source: |
4577 ; 4569 |
| Publisher Information: |
American Geophysical Union |
| Publication Year: |
2018 |
| Collection: |
Imperial College London: Spiral |
| Subject Terms: |
Science & Technology; Physical Sciences; Geosciences; Multidisciplinary; Geology; Magnetic Reconnection; Magnetosheath; Plasma heating; Electron hole; Magnetospheric Multiscale; EARTHS MAGNETOPAUSE DEPENDENCE; INFLOW ALFVEN SPEED; TURBULENT MAGNETOSHEATH; MMS OBSERVATIONS; SOLAR-WIND; X LINE; PLASMA; SHEAR; MD Multidisciplinary; Meteorology & Atmospheric Sciences |
| Description: |
Magnetospheric Multiscale (MMS) observations are used to probe the structure and temperature profile of a guide field reconnection exhaust ~100 ion inertial lengths downstream from the X‐line in the Earth's magnetosheath. Asymmetric Hall electric and magnetic field signatures were detected, together with a density cavity confined near one edge of the exhaust and containing electron flow toward the X‐line. Electron holes were also detected both on the cavity edge and at the Hall magnetic field reversal. Predominantly parallel ion and electron heating was observed in the main exhaust but within the cavity, electron cooling and enhanced parallel ion heating was found. This is explained in terms of the parallel electric field, which inhibits electron mixing within the cavity on newly reconnected field lines, but accelerates ions. Consequently, guide field reconnection causes inhomogeneous changes in ion and electron temperature across the exhaust. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| Relation: |
Geophysical Research Letters; http://hdl.handle.net/10044/1/60817; https://dx.doi.org/10.1029/2018GL077670; ST/N000692/1 |
| DOI: |
10.1029/2018GL077670 |
| Availability: |
http://hdl.handle.net/10044/1/60817; https://doi.org/10.1029/2018GL077670 |
| Rights: |
©2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Accession Number: |
edsbas.1FBC468C |
| Database: |
BASE |