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Drift-Bounce Resona...
Drift-Bounce Resonance Between Pc5 Pulsations and Ions at Multiple Energies in the Nightside Magnetosphere : Arase and MMS Observations
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- Oimatsu, S. (author)
- Kyoto Univ, Grad Sch Sci, Kyoto, Japan.
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- Nose, M. (author)
- Kyoto Univ, Grad Sch Sci, Kyoto, Japan.
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- Teramoto, M. (author)
- Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan.
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- Yamamoto, K. (author)
- Kyoto Univ, Grad Sch Sci, Kyoto, Japan.
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- Matsuoka, A. (author)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Tokyo, Japan.
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- Kasahara, S. (author)
- Univ Tokyo, Grad Sch Sci, Tokyo, Japan.
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- Yokota, S. (author)
- Osaka Univ, Grad Sch Sci, Suita, Osaka, Japan.
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- Keika, K. (author)
- Univ Tokyo, Grad Sch Sci, Tokyo, Japan.
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- Le, G. (author)
- NASA, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD USA.
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- Nomura, R. (author)
- Japan Aerosp Explorat Agcy, Environm Test Technol Unit, Tokyo, Japan.
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- Fujimoto, A. (author)
- Kyushu Univ, Int Ctr Space Weather Sci & Educ, Fukuoka, Fukuoka, Japan.
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- Sormakov, D. (author)
- Arctic & Antarctic Res Inst, St Petersburg, Russia.
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- Troshichev, O. (author)
- Arctic & Antarctic Res Inst, St Petersburg, Russia.
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Tanaka, Y. -M (author)
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- Shinohara, M. (author)
- Kagoshima Coll, Natl Inst Technol, Kagoshima, Japan.
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- Shinohara, I. (author)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Tokyo, Japan.
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- Miyoshi, Y. (author)
- Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan.
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- Slavin, J. A. (author)
- Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA.
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- Ergun, R. E. (author)
- Univ Colorado, Dept Astrophys & Planetary Sci, Denver, CO 80202 USA.
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- Lindqvist, Per-Arne (author)
- KTH,Rymd- och plasmafysik
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Kyoto Univ, Grad Sch Sci, Kyoto, Japan Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan. (creator_code:org_t)
- American Geophysical Union (AGU), 2018
- 2018
- English.
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In: Geophysical Research Letters. - : American Geophysical Union (AGU). - 0094-8276 .- 1944-8007. ; 45:15, s. 7277-7286
- 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
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- A Pc5 wave is observed by the Exploration of energization and Radiation in Geospace Arase satellite in the inner magnetosphere (L similar to 5.4-6.1) near postmidnight (L-magnetic local time similar to 1.8-2.5 hr) during the storm recovery phase on 27 March 2017. Its azimuthal wave number (m-number) is estimated using two independent methods with satellites and ground observations to be -8 to -15. The direct measurement of the m-number enables us to calculate the resonance energy. The flux oscillations of H+ and O+ ions at >= 56.3 keV are caused by drift resonance and those of O+ ions at <= 18.6 keV by bounce resonance. Resonances of O+ ions at multiple energies are simultaneously observed for the first time. The enhancement of the O+/H+ flux ratio at <= 18.6 keV indicates selective acceleration of O+ ions through bounce resonance. Plain Language Summary Geomagnetic pulsations are magnetic fluctuations excited by solar wind or plasma instabilities in the magnetosphere. Pc5 waves are continuous geomagnetic pulsations with a period of 150-600 s. A Pc5 wave was observed in the inner magnetosphere during a magnetic storm on 27 March 2017. It propagated westward with a wave number of 8 to 15 and resonated with charged particles, resulting in oscillations of the H+ and O+ ion fluxes at >= 56.3 keV and the O+ ion fluxes at <= 18.6 keV. Resonances of O+ ions at multiple energies are simultaneously observed for the first time. At the same time, the O+/H+ flux ratio at <= 18.6 keV enhanced corresponding to the O+ ion flux oscillations, which indicates selective acceleration of O+ ions through resonances.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Oimatsu, S.
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Nose, M.
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Teramoto, M.
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Yamamoto, K.
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Matsuoka, A.
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Kasahara, S.
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Yokota, S.
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Keika, K.
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Le, G.
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Nomura, R.
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Fujimoto, A.
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Sormakov, D.
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Troshichev, O.
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Tanaka, Y. -M
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Shinohara, M.
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Shinohara, I.
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Miyoshi, Y.
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Slavin, J. A.
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Ergun, R. E.
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Lindqvist, Per-A ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Geophysical Rese ...
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Royal Institute of Technology