کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9828611 | 1523978 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
ULF wave measurements aboard the Magion-4 subsatellite: narrow-band wave events observed in the magnetopause regions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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![عکس صفحه اول مقاله: ULF wave measurements aboard the Magion-4 subsatellite: narrow-band wave events observed in the magnetopause regions ULF wave measurements aboard the Magion-4 subsatellite: narrow-band wave events observed in the magnetopause regions](/preview/png/9828611.png)
چکیده انگلیسی
Using ULF electromagnetic measurements obtained by the Magion-4 subsatellite of the Interball-1 spacecraft, we study the wave activity in the high-latitude magnetopause and magnetosheath. The observed ULF wave activity is characterized by two types of spectra: (a) narrow-band waves of frequency â¼0.33Â Hz observed near the magnetopause and (b) broadband spectrum of turbulent nature having discrete bursts of â¼ minute duration. We focus on the case (a) in this article. These narrow-band waves occur rarely, mostly under northward IMF conditions. Their frequency seems stable while their intensity is modulated. The characteristics of the narrow-band ULF events are reminiscent of 3Â s-period ULF waves observed by ISEE spacecraft in the foreshock environment, except that the waves discussed in this paper are observed near the magnetopause, inside the magnetosphere. A possible generation mechanism for the observed ULF waves is briefly proposed. We suggest that the emergence of narrow-band ULF events in the magnetopause region at a frequency below the ion cyclotron frequency may be associated with anisotropic ion fluxes flowing just inside the magnetopause.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 53, Issues 1â3, JanuaryâMarch 2005, Pages 317-326
Journal: Planetary and Space Science - Volume 53, Issues 1â3, JanuaryâMarch 2005, Pages 317-326
نویسندگان
D. Teodosiev, P. Nenovski, P. Hristov, R. Koleva, J. Vojta, P. Triska, J. Chum, I. Shibaev,