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A viable source of low-latitude Pc3's in the magnetosphere
https://nipr.repo.nii.ac.jp/records/1593
https://nipr.repo.nii.ac.jp/records/1593a12aea3e-f1ae-4c99-a5e6-9fc87b6fef08
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||
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公開日 | 1984-07-01 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | A viable source of low-latitude Pc3's in the magnetosphere | |||||||
言語 | ||||||||
言語 | eng | |||||||
資源タイプ | ||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
資源タイプ | departmental bulletin paper | |||||||
ページ属性 | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | P(論文) | |||||||
著者名(英) |
Yumoto, Kiyohumi
× Yumoto, Kiyohumi
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著者所属(英) | ||||||||
en | ||||||||
Onagawa Magnetic Observatory and Geophysical Institute, Tohoku University | ||||||||
抄録(英) | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | Daytime magnetic pulsations observed at synchronous orbit by GOES 2 are analyzed to determine whether there is a candidate for the source of low-latitude Pc 3's in the outer magnetosphere. Compressional, radially transverse, and azimuthally transverse modes of magnetic pulsations in a wide frequency range exist simultaneously in the outer daytime magnetosphere. The compressional and the transverse modes of the daytime magnetic pulsations observed at GOES 2 are statistically dominant in the Pc 3 and in the Pc 4 frequency ranges, respectively. Some 70 percent of the compressional Pc 3 pulsations at GOES 2 have periods similar to the low-latitude Pc 3's observed at San Gabriel Canyon, which is located ∿ 11°west of GOES 2's longitude at L=1.8. The transverse Pc pulsations at GOES 2 can propagate only into the high-latitude ionosphere. The compressional Pc 3 pulsations at GOES 2 are theoretically expected to propagate across the ambient magnetic field to very low latitudes and to couple with one or more of the followings; (i) a surface wave at the plasmapause (Lpp), (ii) a trapped oscillation of the fast magnetosonic wave in the plasmasphere (L=1.7∿Lpp), (iii) a higher-harmonic standing oscillation of a local field line at mid-latitudes (L=2.0∿Lpp), and (iv) a fundamental standing oscillation at very low latitudes (L=1.1 and 1.7-2.6). Although further research is needed to clarify the wave and propagation characteristics of the low-latitude Pc 3 pulsations, we believe that the compressional Pc 3 magnetic pulsations in the outer magnetosphere are a source of the low-latitude Pc 3 magnetic pulsations. | |||||||
雑誌書誌ID | ||||||||
収録物識別子タイプ | NCID | |||||||
収録物識別子 | AA00733561 | |||||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 31, p. 63-81, 発行日 1984-07 |