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Solar modulation model considering the nonlinear diffusion process and its generalization

Research Project

Project/Area Number 20K03956
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionIbaraki National College of Technology

Principal Investigator

Miyake Shoko  茨城工業高等専門学校, 国際創造工学科, 准教授 (00613027)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords銀河宇宙線 / 太陽風 / 磁気乱流 / シミュレーション / 太陽圏 / 粒子加速
Outline of Research at the Start

太陽活動に伴う低エネルギー銀河宇宙線の強度変動(太陽変調現象)には、太陽圏内における磁気乱流の駆動メカニズムや太陽系近傍の白色矮星での粒子加速に関する情報が隠されている。本研究では、観測を再現しうる精密太陽変調モデルを構築することで、これら新知見の獲得に迫る。また同時に低エネルギー銀河宇宙線のエネルギースペクトルの数値解を汎用化し公開することで、銀河宇宙線による放射線被ばくや宇宙機の電子機器損傷等の宇宙利用リスク管理など、それを必要とする関連学術研究に貢献する。

Outline of Final Research Achievements

A precise solar modulation model that takes into account nonlinear diffusion processes was constructed, and by comparing it with fluxes of cosmic ray protons and electrons observed by BESS, PAMELA, AMS-02, and CALET, the driving mechanism of magnetic turbulence in the heliosphere and the local interstellar space energy spectrum in the GeV region were estimated. In addition, analysis of low-energy protons and electrons by CALET progressed, and theoretical consideration was achieved using the latest observation results. We also created a demo site to make general-purpose data on cosmic ray energy spectra available. As soon as the results of this research are reported as a paper, we will open these data by using the data public site.

Academic Significance and Societal Importance of the Research Achievements

本研究により、太陽変調モデルを用いて太陽圏内における磁気乱流の駆動メカニズムを逆に探る新しい手法を確立できた。またGeV領域のLISの検証は、近年発見されている様々な宇宙線核種の数十GeV領域におけるエネルギースペクトル冪指数の変化に関連する可能性もあり、今後の進展が期待される。その他宇宙線エネルギースペクトルの汎用化と汎用データの公開は、宇宙線を専門としない関連学術研究や実用科学に寄与できると期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (20 results)

All 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 2 results,  Open Access: 4 results) Presentation (11 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] NASA/GSFC/Washington University/University of Maryland(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] INFN/University of Pisa/University of Padova(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] NASA/GSFC/Washington University/University of Maryland(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] INFN/University of Pisa/University of Padova(イタリア)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station2023

    • Author(s)
      Adriani O., Akaike Y., ..., Miyake S., ..., Munakata K. et al. (CALET Collaboration)
    • Journal Title

      Physical Review Letters

      Volume: 130 Issue: 21 Pages: 211001-211001

    • DOI

      10.1103/physrevlett.130.211001

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cosmic-Ray Modulation during Solar Cycles 24-25 Transition Observed with CALET on the International Space Station2023

    • Author(s)
      Shoko Miyake, Kazuoki Munakata and Yosui Akaike for the CALET collaboration
    • Journal Title

      Proceedings of 38th International Cosmic Ray Conference - PoS(ICRC 2023)

      Volume: - Pages: 1253-1253

    • DOI

      10.22323/1.444.1253

    • Related Report
      2023 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Charge-sign dependent cosmic-ray modulation observed with the Calorimetric Electron Telescope on the International Space Station2023

    • Author(s)
      O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, ..., S. Miyake (44番目), ..., W. V. Zober (計80名)
    • Journal Title

      Physical Review Letters

      Volume: in press

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Solar Modulation During the Descending Phase of Solar Cycle 24 Observed with CALET on the International Space Station2021

    • Author(s)
      Shoko Miyake, on behalf of the CALET Collaboration
    • Journal Title

      Proceedings of Science

      Volume: ICRC2021 Pages: 1270-1270

    • Related Report
      2021 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] Cosmic-Ray Modulation during Solar Cycles 24-25 Transition Observed with CALET on the International Space Station2023

    • Author(s)
      Shoko Miyake, Kazuoki Munakata, Yosui Akaike, for the CALET Collaboration
    • Organizer
      38th International Cosmic Ray Conference (ICRC 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 太陽圏内における宇宙線伝播を探る-最新観測結果とその解釈-2023

    • Author(s)
      三宅晶子, 宗像一起, 赤池陽水, 鳥居祥二, 他 CALETチーム
    • Organizer
      「宇宙線で繋ぐ文明・地球環境・太陽系・銀河 2023」研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] CALETの観測結果を用いた第24-25期太陽活動 遷移期間における太陽変調の理論的検証2023

    • Author(s)
      三宅晶子, 宗像一起, 片岡龍峰, 加藤千尋, 鳥居祥二, 中平 聡志, 寺澤敏夫, 赤池陽水, 小林兼好, 他 CALETチーム
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Modeling the solar modulation of galactic cosmic rays based on the latest observation results by CALET on the International Space Station2023

    • Author(s)
      S. Miyake, K. Munakata, Y. Akaike, for the CALET Collaboration
    • Organizer
      AGU Fall Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] CALETの7年間の観測に基づく太陽変調の荷電依存性の観測結果2023

    • Author(s)
      三宅晶子, 宗像一起, 赤池陽水, 鳥居祥二, 小林兼好, 片岡龍峰, 中平 聡志, 浅岡 陽一, 寺澤敏夫, 他 CALETチーム
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 銀河宇宙線太陽変調における惑星間空間磁場乱流成分の11年周期変動の影響2022

    • Author(s)
      三宅晶子
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Modeling the Solar Modulation Based on the Nonlinear Cosmic-Ray Diffusion Process2022

    • Author(s)
      Shoko Miyake
    • Organizer
      44th COSPAR Scientific Assembly
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] CALETによる第24/25期太陽活動極小期の低エネルギー電子・陽子観測2022

    • Author(s)
      三宅晶子、宗像一起、加藤千尋、片岡龍峰、中平聡志、浅岡陽一、鳥居祥二、寺澤敏夫、赤池陽水、小林兼好、他 CALETチーム
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Solar Modulation During the Descending Phase of Solar Cycle 24 Observed with CALET on the International Space Station2021

    • Author(s)
      Shoko Miyake, on behalf of the CALET Collaboration
    • Organizer
      37th International Cosmic Ray Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 非線形拡散過程を考慮した銀河宇宙線陽子の太陽変調の数値シミュレーション2021

    • Author(s)
      三宅晶子
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] CALETによる低エネルギー電子・陽子の観測結果を用いた太陽変調モデルの構築2021

    • Author(s)
      三宅晶子,片岡龍峰,宗像一起,高柚季乃,鳥居祥二,寺澤敏夫,他 CALETチーム
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Remarks] [プレスリリース]研究成果発表(三宅 晶子 電気・電子系 准教授)

    • URL

      https://www.ibaraki-ct.ac.jp/info/archives/65791

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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