کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1778157 | 1523677 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Resonant energy conversion of 3-min intensity oscillations into Alfvén waves in the solar atmosphere
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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چکیده انگلیسی
Nonlinear coupling between 3-min oscillations and Alfvén waves in the solar lower atmosphere is studied. Three-minute oscillations are considered as acoustic waves trapped in a chromospheric cavity and oscillating along transversally inhomogeneous vertical magnetic field. It is shown that under the action of the oscillations the temporal dynamics of Alfvén waves is governed by Mathieu equation. Consequently, the harmonics of Alfvén waves with twice period and wavelength of 3-min oscillations grow exponentially in time near the layer where the sound and Alfvén speeds equal i.e. csâvA. Thus the 3-min oscillations are resonantly absorbed by pure Alfvén waves near this resonant layer. The resonant Alfvén waves may penetrate into the solar corona taking energy from the chromosphere. Therefore the layer csâvA may play a role of energy channel for otherwise trapped acoustic oscillations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 70, Issues 2â4, February 2008, Pages 351-355
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 70, Issues 2â4, February 2008, Pages 351-355
نویسندگان
D. Kuridze, T.V. Zaqarashvili,