Observations Directly Linking Relativistic Electron Microbursts to Whistler Mode Chorus: Van Allen Probes and FIREBIRD II
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- A. W. Breneman
- School of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA
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- A. Crew
- The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
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- J. Sample
- Department of Physics Montana State University Bozeman MT USA
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- D. Klumpar
- Department of Physics Montana State University Bozeman MT USA
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- A. Johnson
- Department of Physics Montana State University Bozeman MT USA
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- O. Agapitov
- Space Science Laboratory The University of California Berkeley CA USA
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- M. Shumko
- Department of Physics Montana State University Bozeman MT USA
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- D. L. Turner
- Aerospace Corporation El Segundo CA USA
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- O. Santolik
- Department of Space Physics, Institute of Atmospheric Physics Czech Academy of Sciences Prague Czech Republic
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- J. R. Wygant
- School of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA
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- C. A. Cattell
- School of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA
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- S. Thaller
- School of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA
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- B. Blake
- Aerospace Corporation El Segundo CA USA
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- H. Spence
- Department of Physics University of New Hampshire Durham NH USA
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- C. A. Kletzing
- Department of Physics and Astronomy University of Iowa Iowa City IA USA
書誌事項
- 公開日
- 2017-11-28
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/2017gl075001
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>We present observations that provide the strongest evidence yet that discrete whistler mode chorus packets cause relativistic electron microbursts. On 20 January 2016 near 1944 UT the low Earth orbiting CubeSat Focused Investigations of Relativistic Electron Bursts: Intensity, Range, and Dynamics (FIREBIRD II) observed energetic microbursts (near <jats:italic>L</jats:italic> = 5.6 and MLT = 10.5) from its lower limit of 220 keV, to 1 MeV. In the outer radiation belt and magnetically conjugate, Van Allen Probe A observed rising‐tone, lower band chorus waves with durations and cadences similar to the microbursts. No other waves were observed. This is the first time that chorus and microbursts have been simultaneously observed with a separation smaller than a chorus packet. A majority of the microbursts do not have the energy dispersion expected for trapped electrons bouncing between mirror points. This confirms that the electrons are rapidly (nonlinearly) scattered into the loss cone by a coherent interaction with the large amplitude (up to ∼900 pT) chorus. Comparison of observed time‐averaged microburst flux and estimated total electron drift shell content at <jats:italic>L</jats:italic> = 5.6 indicate that microbursts may represent a significant source of energetic electron loss in the outer radiation belt.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 44 (22), 11,265-, 2017-11-28
American Geophysical Union (AGU)
