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First observation o...
First observation of rising-tone magnetosonic waves
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Fu, H. S. (author)
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Cao, J. B. (author)
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Zhima, Z. (author)
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- Khotyaintsev, Yuri V. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Angelopoulos, V. (author)
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Santolik, O. (author)
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Omura, Y. (author)
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- Taubenschuss, Ulrich (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Chen, L. (author)
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Huang, S. Y. (author)
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 41:21, s. 7419-7426
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Magnetosonic (MS) waves are linearly polarized emissions confined near the magnetic equator with wave normal angle near 90 degrees and frequency below the lower hybrid frequency. Such waves, also termed equatorial noise, were traditionally known to be "temporally continuous" in their time-frequency spectrogram. Here we show for the first time that MS waves actually have discrete wave elements with rising-tone features in their spectrogram. The frequency sweep rate of MS waves, similar to 1 Hz/s, is between that of chorus and electromagnetic ion cyclotron (EMIC) waves. For the two events we analyzed, MS waves occur outside the plasmapause and cannot penetrate into the plasmasphere; their power is smaller than that of chorus. We suggest that the rising-tone feature of MS waves is a consequence of nonlinear wave-particle interaction, as is the case with chorus and EMIC waves.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fu, H. S.
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Cao, J. B.
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Zhima, Z.
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Khotyaintsev, Yu ...
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Angelopoulos, V.
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Santolik, O.
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show more...
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Omura, Y.
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Taubenschuss, Ul ...
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Chen, L.
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Huang, S. Y.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geology
- Articles in the publication
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Geophysical Rese ...
- By the university
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Uppsala University