Generation of whistler mode waves and particle accelerations based on macro-micro simulations

2010 Fiscal Year Final Research Report

• Project/Area Number: 20740283
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University
• Principal Investigator: MIYOSHI Yoshizumi Nagoya University, 太陽地球環境研究所, 助教 (10377781)
• Project Period (FY): 2008 – 2010
• Keywords: 内部磁気圏 / 放射線帯 / 波動粒子相互作用 / シミュレーション

Research Abstract

We have investigated temporal-spatial evolution of whistler mode waves in the inner magnetosphere using the global and microscopic simulations and have compared with the satellite observations. The average distributions of whistler mode waves taken from the simulations are consistent with the CRRES statistical survey results. The microscopic simulation, using the distribution function and fp/fc from the global simulation as an initial condition, showed significant evolution of whistler mode waves. From the simulation study on a magnetic storm, we observed shrinkage of the plasmasphere, continuous hot electron injections due to enhanced convection, and resultant whistler wave generations near the plamapause. These results are consistent with the statistical analysis of hot electron and whistler mode waves during the events in which large flux enhancement of the MeV electrons takes place. Moreover, we confirmed that the frequency with maximum growth depends on the region and the phase of a magnetic storm, which are consistent with the statistical survey from the Cluster satellite.

Research Products

• [Journal Article] Solar cycle variations of outer radiation belt and its relationship to solar wind structure dependences (2011)
  • Author(s): Miyoshi, Y.R.Kataoka
  • Journal Title: J.Atm.Solar-Terr.Phys. 73 Pages: 77-87
• [Journal Article] Transport and loss of the inner plasma sheet electrons: THEMIS observations (2011)
  • Author(s): Kurita, S.Y.Miyoshi, F.Tsuchiya, T.Nishimura, T.Hori, Y.Miyashita, T.Takada, A.Morioka, V.Angelopoulos, J.McFadden, U.Auster, J.Albert, V.Jordanova, H.Misawa
  • Journal Title: J.Geophys.Res. 116 Pages: A03201,doi:10.1029/2010JA015975
• [Journal Article] Outer radiation belt boundary location relative to the magnetopause: Implications for magnetopause shadowing (2011)
  • Author(s): Matsumura, C.Y.Miyoshi, K.Seki, S.Saito, V.Angelopoulos, J.Koller
  • Journal Title: J.Geophys.Res. in press Pages: doi:10.1029/2011JA016575
• [Journal Article] A split in the outer radiation belt by magnetopause shadowing: Test particle simulations (2010)
  • Author(s): Saito, S.Y.Miyoshi, K.Seki
  • Journal Title: J.Geophys.Res. 115 Pages: A08210,doi:10.1029/2009JA014738
• [Journal Article] Why are relativistic electrons persistently quiet at geosynchronous orbit in 2009 (2010)
  • Author(s): Kataoka, R.Y.Miyoshi
  • Journal Title: Space Weather 8 Pages: S08002,doi:10.1029/2010SW000571
• [Journal Article] Time of flight analysis of pulsating aurora electrons, considering wave-particle interactions with propagating whistler mode waves (2010)
  • Author(s): Miyoshi, Y.Y.Katoh, T.Nishiyama, T.Sakanoi, K.Asamura, M.Hirahara
  • Journal Title: J.Geophys.Res. 115 Pages: A10312,doi:10.1029/2009JA015127
• [Journal Article] Simultaneous satellite observations of VLF chorus, hot and relativistic electrons in a magnetic storm recovery phase (2009)
  • Author(s): Kasahara, Y.Y.Miyoshi, Y.Omura, O.Verkhoglyadova, I.Nagano, I.Kimura, B.Tsurutani
  • Journal Title: Geophys.Res.Lett. 36 Pages: L01106,doi:10.1029/2008GL036454
• [Journal Article] Numerical simulation of energetic electrons in the inner magnetosphere during the October 2001 storm, FUTURE PERSPECTIVES OF SPACE PLASMA AND PARTICLE INSTRUMENTATION AND INTERNATIONAL COLLABORATIONS (2009)
  • Author(s): Miyoshi, Y.V.K.Jordanova
  • Journal Title: edited by M.Hirahara, I.Shinohara, Y.Miyoshi, N.Terada, T.Mukai AIP Press 1144 Pages: 142-145,doi:10.1063/1.3169278
• [Journal Article] Precipitation of radiation belt electrons by EMIC waves, observed from ground and space (2008)
  • Author(s): Miyoshi, Y.K.Sakaguchi, K.Shiokawa, D.Evans, J.Albert, M.Conners, V.Jordanova
  • Journal Title: Geophys.Res.Lett. 35 Pages: L23101,doi:10.1029/2008GL035727
• [Journal Article] Relativistic electron precipitation by EMIC waves from self-consistent global simulations (2008)
  • Author(s): Jordanova, V.K.J.Albert, Y.Miyoshi
  • Journal Title: J.Geophys.Res. 113 Pages: A00A10,doi:10.1029/2008JA013239
• [Journal Article] Excitation of whistler-mode chorus from global ring current simulations
  • Author(s): Joranova, V.K.R.M.Thorne, W.Li, Y.Miyoshi
  • Journal Title: J.Geophys.Res. 115 Pages: A00F10,doi:10.1029/2009JA014810
• [Presentation] Simulation study on evolution of whistler waves during a storm time (2011)
  • Author(s): Y.Miyoshi, V.Jordanova, N.Meredith, Y.Matsumoto
  • Organizer: Earth-Sun system exploration variability in space plasma phenomena
  • Place of Presentation: 米国(招待講演)
  • Year and Date: 20110100
• [Presentation] Flux enhancement of the outer radiation belt by whistler waves (2010)
  • Author(s): Y.Miyoshi, R.Kataoka, Y.Kasahara
  • Organizer: 2010Asia-Pacific Radio Science Conference
  • Place of Presentation: 日本(招待講演)
  • Year and Date: 20100900
• [Presentation] Solar Wind- Radiation Belt Coupling (2010)
  • Author(s): Y.Miyoshi, R.Kataoka
  • Organizer: 2010 Western Pacific Geophysics Meeting
  • Place of Presentation: 台湾(招待講演)
  • Year and Date: 20100600
• [Presentation] ジオスペースにおける相対論的電子加速 (2010)
  • Author(s): 三好由純
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 日本(招待講演)
  • Year and Date: 20100500
• [Presentation] 太陽風流れの接触面通過時の内部磁気圏ホイッスラーモード波動の変化 (2009)
  • Author(s): 三好由純、片岡龍峰、笠原禎也
  • Organizer: 地球電磁気・地球惑星圏学会第125回総会・講演会
  • Place of Presentation: 日本
  • Year and Date: 20090900
• [Presentation] 第21-23太陽活動周期における放射線帯外帯の変動メカニズム (2009)
  • Author(s): 三好由純、片岡龍峰
  • Organizer: 日本惑星科学連合大会2009年大会
  • Place of Presentation: 日本(招待講演)
  • Year and Date: 20090500
• [Presentation] Effective solar wind structures for large flux enhancement of the outer radiation belt (2008)
  • Author(s): Y.Miyoshi, R.Kataoka
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: 米国(招待講演)
  • Year and Date: 20081200
• [Presentation] 磁気嵐時の内部磁気圏高エネルギー電子とホイッスラー波動 (2008)
  • Author(s): Y.Miyoshi, V.Jordanova, N.Meredith
  • Organizer: 地球電磁気・地球惑星圏学会第124回総会・講演会
  • Place of Presentation: 日本
  • Year and Date: 20081000
• [Presentation] Solar wind radiation belt interactions (2008)
  • Author(s): Y.Miyoshi, R.Kataoka
  • Organizer: Inner Magnetospheric Coupling Conference
  • Place of Presentation: フィンランド
  • Year and Date: 20080700
• [Presentation] Effect of whistler mode waves for large flux enhancement of the outer belt (2008)
  • Author(s): Y.Miyoshi
  • Organizer: Inner Magnetospheric Coupling Conference
  • Place of Presentation: フィンランド(招待講演)
  • Year and Date: 20080700
• [Presentation] ジオスペースダイナミクスの中でのプラズマ波動
  • Author(s): 三好由純
  • Organizer: STEシミュレーション研究会および宇宙プラズマ波動研究会
  • Place of Presentation: 日本
• [Book] 総説宇宙天気「放射線帯」 (2011)
  • Author(s): 柴田一成、上出洋介編
  • Publisher: 京都大学出版会
• [Remarks] ホームページ等