تقرير
Alfvenic Fluctuations Associated with Jupiter's Auroral Emissions
| العنوان: | Alfvenic Fluctuations Associated with Jupiter's Auroral Emissions |
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| المؤلفون: | Gershman, Daniel J, Connerney, John E. P, Kotsiaros, Stavros, DiBraccio, Gina A, Martos, Yasmina M, F.‐Viñas, Adolfo, Hue, Vincent, Clark, George, Bagenal, Fran, Levin, Steve, Bolton, Scott J |
| المصدر: | Geophysical Research Letters. 46(13) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Lunar And Planetary Science And Exploration |
| الوصف: | The Alfvén wave mode transmits field‐aligned currents and large‐scale turbulence throughout Jupiter's magnetosphere. Magnetometer data from the Juno spacecraft have provided the first observations of Alfvénic fluctuations along the polar magnetic flux tubes connected to Jupiter's main auroral oval and the Jovian satellites. Transverse magnetic field perturbations associated with Io are observed up to ~90° away from main Io footprint, supporting the presence of extended Alfvénic wave activity throughout the Io footprint tail. Additional broadband fluctuations measured equatorward of the statistical auroral oval are composed of incompressible magnetic turbulence that maps to Jupiter's equatorial plasma sheet at radial distances within ~20 R(sub J). These fluctuations exhibit a k(sub ||) power spectrum consistent with strong magnetohydrodynamic turbulence. This turbulence can generate up to ~100 mW/m(exp 2) of Poynting flux to power the Jovian aurora in regions connected to the inner magnetosphere's central plasma sheet. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| DOI: | 10.1029/2019GL082951 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20190032542 |
| ملاحظات: | 80GSFC17C0003 80GSFC17M0002 |
| رقم الأكسشن: | edsnas.20190032542 |
| قاعدة البيانات: | NASA Technical Reports |
| DOI: | 10.1029/2019GL082951 |
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