تقرير
Force-free current sheets in the Jovian magnetodisk: the key role of electron field-aligned anisotropy
| العنوان: | Force-free current sheets in the Jovian magnetodisk: the key role of electron field-aligned anisotropy |
|---|---|
| المؤلفون: | Artemyev, A. V., Ma, Q., Ebert, R. W., Zhang, X. -J., Allegrini, F. |
| سنة النشر: | 2023 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Space Physics, Physics - Plasma Physics |
| الوصف: | Current sheets are an essential element of the planetary magnetotails, where strong plasma currents self-consistently support magnetic field gradients. The current sheet configuration is determined by plasma populations that contribute to the current density. The most commonly investigated configuration is supported by diamagnetic cross-field currents of hot ions, typical for the magnetospheres of magnetized planets. In this study, we examine a new type of the current sheet configuration supported by field-aligned currents from electron streams in the Jovian magnetodisk. Such bi-directional streams increase the electron thermal anisotropy close to the fire-hose instability threshold and lead to strong magnetic field shear. The current sheet configuration supported by electron streams is nearly force-free, with B=const across the sheet. Using Juno plasma and magnetic field measurements, we investigate the internal structure of such current sheets and discuss possible mechanisms for their formation. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1029/2022JA031280 |
| URL الوصول: | http://arxiv.org/abs/2301.03731 |
| رقم الأكسشن: | edsarx.2301.03731 |
| قاعدة البيانات: | arXiv |
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