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Direct estimation of turbulent transport coefficients in solar mean-field dynamo models

Research Project

Project/Area Number 19K14756
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 16010:Astronomy-related
Research InstitutionNagoya University

Principal Investigator

Iijima Haruhisa  名古屋大学, 宇宙地球環境研究所, 特任助教 (90783952)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords乱流 / 太陽 / 磁場 / 光球 / ダイナモ
Outline of Research at the Start

太陽・恒星におけるダイナモ機構に関して、熱対流に伴う乱流を平均化した平均場モデルに基づき、これまで数多くの研究が行われてきた。しかし、平均場モデルで最も重要な乱流輸送パラメータは定量化されず、観測と合うように調整されていた。
本研究では、太陽ダイナモ過程の平均場モデルにおける乱流輸送パラメータを、太陽表面構造の正確なモデル化が可能な輻射磁気流体計算を用いて直接的に評価する。
本研究により、太陽ダイナモの平均場モデル研究をより定量的なものへとシフトさせ、太陽型星以外の恒星を含めた太陽・恒星ダイナモの統一的理解への貢献すると期待される。

Outline of Final Research Achievements

Many studies have been conducted on the mean-field model that simulates plasma turbulence associated with thermal convection to elucidate the solar dynamo. However, the turbulent transport parameters, the free parameters in the mean-field model, have been adjusted in almost all studies to maintain consistency between the model and observations. In this study, we aim to directly evaluate the turbulent transport parameters in the mean-field model of the solar surface based on radiative magnetohydrodynamic simulations that allow an accurate approximation of the solar surface magneto-convection.

Academic Significance and Societal Importance of the Research Achievements

太陽ダイナモ問題は太陽における最古の未解決問題の一つである。黒点は強大な磁場を持ち、フレアに代表される太陽爆発現象、ひいては各種宇宙天気擾乱のエネルギー源となっている。この黒点を生み出す太陽ダイナモ機構の解明が、太陽物理学上の長年の課題である。本研究では、太陽表面の正確な近似が可能な3次元輻射磁気流体モデルを利用することで、これまで経験的に扱われてきた太陽表層のプラズマ乱流を定量的に扱う枠組みを確立することが出来た。これにより、今後の太陽ダイナモ研究の定量性と物理的理解を高めるための基盤と、より観測的な制約が少ない恒星ダイナモモデルの構築へ向けた足がかりを作ることが出来たと考えている。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (34 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (27 results) (of which Int'l Joint Research: 6 results,  Invited: 8 results)

  • [Int'l Joint Research] The University of Sheffield(英国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] A New Broadening Technique of the Numerically Unresolved Solar Transition Region and Its Effect on the Spectroscopic Synthesis Using Coronal Approximation2021

    • Author(s)
      Iijima Haruhisa、Imada Shinsuke
    • Journal Title

      The Astrophysical Journal

      Volume: 917 Issue: 2 Pages: 65-65

    • DOI

      10.3847/1538-4357/ac07a5

    • NAID

      120007190682

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fast Magnetic Wave Could Heat the Solar Low-beta Chromosphere2021

    • Author(s)
      Wang Yikang、Yokoyama Takaaki、Iijima Haruhisa
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 916 Issue: 2 Pages: L10-L10

    • DOI

      10.3847/2041-8213/ac10c7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Energy-consistent finite difference schemes for compressible hydrodynamics and magnetohydrodynamics using nonlinear filtering2021

    • Author(s)
      Iijima Haruhisa
    • Journal Title

      Journal of Computational Physics

      Volume: 435 Pages: 110232-110232

    • DOI

      10.1016/j.jcp.2021.110232

    • Related Report
      2020 Research-status Report
  • [Journal Article] On rising magnetic flux tube and formation of sunspots in a deep domain2020

    • Author(s)
      Hotta, H; Iijima, H.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: N/A Issue: 2 Pages: 2523-2537

    • DOI

      10.1093/mnras/staa844

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of Morphological Asymmetry between Leading and Following Sunspots on the Prediction of Solar Cycle Activity2019

    • Author(s)
      Iijima H.、Hotta H.、Imada S.
    • Journal Title

      The Astrophysical Journal

      Volume: 883 Issue: 1 Pages: 24-24

    • DOI

      10.3847/1538-4357/ab3b04

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Chromospheric polarimetry through multiline observations of the 850?nm spectral region III: Chromospheric jets driven by twisted magnetic fields2019

    • Author(s)
      Quintero?Noda C、Iijima H、Katsukawa Y、Shimizu T、Carlsson M、de?la?Cruz?Rodr?guez J、Ruiz?Cobo B、Orozco?Su?rez D、Oba T、Anan T、Kubo M、Kawabata Y、Ichimoto K、Suematsu Y
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 486 Issue: 3 Pages: 4203-4215

    • DOI

      10.1093/mnras/stz1124

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] スピキュールについて2023

    • Author(s)
      飯島陽久
    • Organizer
      2022年度太陽研連シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 磁気乱流が駆動する太陽からの超音速プラズマ流2023

    • Author(s)
      飯島陽久
    • Organizer
      第2回「富岳」成果創出加速プログラム 研究交流会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Radiative MHD simulation of the solar corona with RAMENS2022

    • Author(s)
      Haruhisa Iijima
    • Organizer
      Advances in Solar MHD Numerical Simulations in the Era of High-Resolution Observations
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 熱対流と磁場が駆動する太陽大気の形成過程2022

    • Author(s)
      飯島陽久
    • Organizer
      CfCA User’s Meeting
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 低速太陽風の3次元輻射磁気流体計算2022

    • Author(s)
      飯島陽久
    • Organizer
      第9回「富岳」を中核とするHPCIシステム利用研究課題
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 射磁気流体シミュレーション研究の将来2022

    • Author(s)
      飯島陽久
    • Organizer
      太陽研連2022年度将来計画シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 黒点群を起源とする太陽風の3次元輻射磁気流体シミュレーション2022

    • Author(s)
      飯島陽久
    • Organizer
      2021年度名古屋大学HPC計算科学連携研究プロジェクト成果報告会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 太陽大気の輻射磁気流体モデルにおける現状と課題2022

    • Author(s)
      飯島陽久
    • Organizer
      2021年度ISEE研究集会「太陽地球圏環境予測のためのモデル研究の展望」
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 対流層からコロナ・太陽風までの包括的3次元輻射磁気流体シミュレーション2022

    • Author(s)
      飯島陽久, 松本琢磨, 堀田英之, 今田晋亮
    • Organizer
      日本天文学会2022年春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 対流層から太陽風までの包括的3次元輻射磁気流体シミュレーション2022

    • Author(s)
      飯島陽久, 松本琢磨, 堀田英之, 今田晋亮
    • Organizer
      2021年度太陽研連シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 太陽対流層からコロナ・太陽風までを含んだ3次元輻射磁気流体シミュレーション2022

    • Author(s)
      飯島陽久, 松本琢磨, 堀田英之, 今田晋亮
    • Organizer
      CfCA User’s Meeting
    • Related Report
      2021 Research-status Report
  • [Presentation] 磁場形成・波動励起からコロナ加熱・太陽風加速までを追う包括的太陽大気モデル2022

    • Author(s)
      飯島陽久, 松本琢磨, 堀田英之, 今田晋亮
    • Organizer
      「富岳で加速する素粒子・原子核・宇宙・惑星」シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] A numerical treatment for the unresolved transition region in the solar atmosphere2021

    • Author(s)
      H. Iijima
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 数値的に解像できない遷移層への対処法と分光観測量への影響2021

    • Author(s)
      飯島陽久, 今田晋亮
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 離散的にエネルギー方程式の整合性を保つ頑健な磁気流体解法の提案2021

    • Author(s)
      飯島陽久
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 輻射磁気流体モデルを用いた太陽黒点周囲におけるプラズマ急加速現象の研究2021

    • Author(s)
      飯島陽久
    • Organizer
      2020年度名古屋大学HPC計算科学連携研究プロジェクト成果報告会
    • Related Report
      2021 Research-status Report
  • [Presentation] Impact of morphological asymmetry in a sunspot group on the solar cycle prediction2020

    • Author(s)
      H. Iijima, H. Hotta, and S. Imada
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Energy-consistent finite difference method for compressible magnetohydrodynamic simulations2020

    • Author(s)
      H. Iijima
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 3次元太陽コロナモデルを用いた鉄イオンのEUV放射における非平衡電離効果の検証2020

    • Author(s)
      飯島陽久, 今田晋亮
    • Organizer
      太陽研連シンポジウム「太陽研究の現状と将来展望」
    • Related Report
      2019 Research-status Report
  • [Presentation] Importance of Morphological Asymmetry between Leading and Following Sunspots on Polar Field Formation and Cycle Prediction2020

    • Author(s)
      H. Iijima, H. Hotta, and S. Imada
    • Organizer
      The 4th PSTEP International Symposium (PSTEP-4) and the 2nd ISEE Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 運動・磁気エネルギー保存型 MHD 解法の構築2020

    • Author(s)
      飯島陽久
    • Organizer
      CfCA User’s Meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] 太陽表層大気のモデリング2019

    • Author(s)
      飯島陽久
    • Organizer
      ISEE・PSTEP研究集会「太陽地球圏環境予測のためのモデル研究の展望」
    • Related Report
      2019 Research-status Report
  • [Presentation] 圧縮性磁気流体計算における差分スキームの保存性2019

    • Author(s)
      飯島陽久
    • Organizer
      日本流体力学会年会2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 太陽大気の 3 次元輻射磁気流体シミュレーション2019

    • Author(s)
      飯島陽久
    • Organizer
      日本天文学会2019年秋季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effect of non-equilibrium ionization on the solar EUV/X-ray spectral diagnosis2019

    • Author(s)
      H. Iijima
    • Organizer
      Hinode-13/IPELS 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 太陽対流層表層部における乱流パンピングの推定2019

    • Author(s)
      飯島 陽久, 堀田 英之, 今田 晋亮
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Radiation magnetohydrodynamic modeling of solar coronal dynamics2019

    • Author(s)
      飯島陽久
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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