کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1781264 | 1523953 | 2013 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Acceleration of ions in the Jupiter magnetotail: Particle resonant interaction with dipolarization fronts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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چکیده انگلیسی
In this paper we describe ion acceleration in the Jupiter magnetotail due to resonant interaction with dipolarization fronts. We present Galileo observations of dipolarization fronts accompanied by observations of increased fluxes of high-energy protons and heavy ions. We develop the analytical model of ion interaction with dipolarization fronts embedded into the magnetotail horizontal current sheet. This model predicts that the maximum energy gained by ions is Wmaxâ¼H03/4LΩx where H0 is an initial ion energy, L is a spatial scale of dipolarization fronts across the neutral plane of the horizontal current sheet, and Ωx is a Larmor frequency of ions in the boundary of the horizontal current sheet. Presented model can describe acceleration of 10-100 keV ions up to 50-300 keV for typical conditions of the Jupiter magnetotail. Analytical estimates are supported by numerical calculations of test-particle trajectories. We reproduce observed increases of proton fluxes up to one order of magnitude in the vicinity of dipolarization fronts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volumes 82â83, July 2013, Pages 134-148
Journal: Planetary and Space Science - Volumes 82â83, July 2013, Pages 134-148
نویسندگان
A.V. Artemyev, S. Kasahara, A.Y. Ukhorskiy, M. Fujimoto,