Yao, ST;
Shi, QQ;
Yao, ZH;
Li, JX;
Yue, C;
Tao, X;
Degeling, AW;
... Giles, BL; + view all
(2019)
Waves in Kinetic‐Scale Magnetic Dips: MMS Observations in the Magnetosheath.
Geophysical Research Letters
, 46
(2)
pp. 523-533.
10.1029/2018GL080696.
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Abstract
Kinetic‐scale magnetic dips (KSMDs), with a significant depression in magnetic field strength, and scale length close to and less than one proton gyroradius, were reported in the turbulent plasmas both in recent observation and numerical simulation studies. These KSMDs likely play important roles in energy conversion and dissipation. In this study, we present observations of the KSMDs that are labeled whistler mode waves, electrostatic solitary waves, and electron cyclotron waves in the magnetosheath. The observations suggest that electron temperature anisotropy or beams within KSMD structures provide free energy to generate these waves. In addition, the occurrence rates of the waves are higher in the center of the magnetic dips than at their edges, implying that the KSMDs might be the origin of various kinds of waves. We suggest that the KSMDs could provide favorable conditions for the generation of waves and transfer energy to the waves in turbulent magnetosheath plasmas.
| Type: | Article |
|---|---|
| Title: | Waves in Kinetic‐Scale Magnetic Dips: MMS Observations in the Magnetosheath |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2018GL080696 |
| Publisher version: | https://doi.org/10.1029/2018GL080696 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | kinetic scale, magnetic hole, whistler mode waves, electrostatic solitary waves, electron cyclotron waves, origin of waves |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10076578 |
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