2003 年度実績報告書

宇宙線衝撃波加速過程の基礎的研究

研究課題

研究課題/領域番号	14340066
研究機関	東京大学
研究代表者	寺沢敏夫東京大学, 大学院・理学系研究科, 教授 (30134662)
研究分担者	横山央明東京大学, 大学院・理学系研究科, 助教授 (00311184) 高原文郎大阪大学, 大学院・理学研究科, 教授 (20154891) 星野真弘東京大学, 大学院・理学系研究科, 教授 (90241257)
キーワード	衝撃波粒子加速 / 相対論的ジェット / 太陽コロナ加熱 / 磁気リコネクション / 磁気ヘリシティ / 地球前面定在衝撃波 / サイクロトロン共鳴 / スローショック
研究概要	衝撃波粒子加速の素過程および関連する物理過程についての理論的、および観測的研究を行い、次の成果を得た: ○活動銀河核での相対論的ジェット形成について新たにWien fireballモデルを提唱し、その詳細な物理的過程を明らかにした。 ○衝撃波フェルミ加速過程を確率過程として記述し時間依存する解の特徴を明らかにした。 ○太陽コロナ加熱についての非線形アルフェン波動の寄与を明らかにした。 ○太陽フレアでの磁気リコネクション開始におけるヘリシティ(螺旋度)注入効果を定量的に明らかにした。 ○地球前面定在衝撃波におけるイオン加速についてpre-dawnからpost-duskに至る広い領域での加速効率、エネルギースペクトルを初めて明らかにした。 ○太陽系近傍の星間空間物質(VLISM)起源のヘリウムHe+イオンについて、その加速に重要な電磁流体乱流中のサイクロトロン共鳴成分は、彗星ピックアップイオンの場合のような自己励起型ではなく、太陽風に内在する乱流であることを示した。 ○磁気リコネクション・スローショック形成における極薄電流層の役割を観測的に明らかにした。

研究成果

(28件)

すべてその他

すべて文献書誌 (28件)

[文献書誌] Iwamoto, S.: "Wien fireball model of relativistic outflows in active galactic nuclei"Astrophys.J.. 601(1)Part1. 78-89 (2004)
[文献書誌] Kataoka, J.: "Chandra discovery of an X-ray jet and lobes in 3C 15"Astron Astrophys.. 410(3). 833-845 (2003)
[文献書誌] Kusunose, M.: "The electron spectrum in 3C 279 and the observed emission spectrum"Astrophys.J.. 592(1)Part2. L5-L8 (2003)
[文献書誌] Kato, TN.: "Probabilistic description of the first-order Fermi acceleration in shock waves : time-dependent solution by the single-particle approach"Mon.Not.R.Astron.Soc.. 342(2). 639-650 (2003)
[文献書誌] Moriyasu, S.: "The Nonlinear Alfven wave model for solar coronal heating and nanoflares"Astrophys.J.. 601(1)Part2. L107-L110 (2004)
[文献書誌] Asano, K.: "Photon emission in a cascade from relativistic protons"Publ.Astron.Soc.Japan. 55(2). 433-444 (2003)
[文献書誌] Yokoyama, T.: "Microwave imaging observation of an electron steam in a solar flare"Adv.Space Res.. 32(12). 2517-2520 (2003)
[文献書誌] Asai, A.: "Evolution of flare ribbons and energy release"Adv.Space Res.. 32(12). 2561-2566 (2003)
[文献書誌] Kusano, K.: "Measurement of magnetic helicity flux into the solar corona"Adv.Space Res.. 32(10). 1917-1922 (2003)
[文献書誌] Kusano, K.: "Annihilation of magnetic helicity : A new model for solar flare onset"Adv.Space Res.. 32(10). 1931-1936 (2003)
[文献書誌] White, S.M.: "Radio and hard X-ray images of high-energy electrons in an X-class solar flare"Astrophys.J.. 595(2)Part2. L111-L114 (2003)
[文献書誌] Miyagoshi, T.: "Magnetohydrodynamic numerical simulations of solar X-ray jets based on the magnetic reconnection model that includes chromospheric evapporation"Astrophys.J.. 593(2) Part2. L133-L136 (2003)
[文献書誌] Bamert, K.: "Hydromagnetic wave excitation upstream of an interplanetary traveling shock"Astrophys.J.. 601(1)Part2. L99-L102 (2003)
[文献書誌] Terasawa, T.: "Astrophysical particle acceleration - Heliosphere as an astrophysical laboratory"Prog.Theor.Phys.Supp.. 151. 95-104 (2003)
[文献書誌] Yamasaki, R.: "Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN 1006 NE rim"Astron.Astrophys.. (in press). (2004)
[文献書誌] Nakata, K.: "Whistler waves in upstream region of interplanetary shocks"Adv.Space Res.. (in press). (2004)
[文献書誌] Oka, M.: "Quest for waves excited by interstellar Helium pickup ions"Adv.Space Res.. (in press). (2004)
[文献書誌] Terasawa, T.: "GEOTAIL observation of solar wind and interplanetary phenomena"Adv.Space Res.. (in press). (2004)
[文献書誌] Takei, Y.: "Solar gamma ray events detected by GEOTAIL plasma instrument"Proc.28th International Cosmic Ray Conference. 6. 3226-3233 (2003)
[文献書誌] Nakata, K.: "The 'proton-assisted' generation process of whistler waves at interplanetary shocks"Proc.28th International Cosmic Ray Conference. 6. 3670-3697 (2003)
[文献書誌] Terasawa, T.: "Acceleration at the Earth's Bow Shock : Spatial Dependence of Acceleration Efficiency"Proc.28th International Cosmic Ray Conference. 6. 3705-3708 (2003)
[文献書誌] Gloecker, G.: "Observations of the Helium focusing cone with pickup ions"Astron.Astrophys.. (in press). (2004)
[文献書誌] Moebius, E.: "Synopsis of the Interstellar He Parameters from Combined Neutral Gas: Pickup Ion and UV Scattering Observations and Related Consequences"Astronomy and Astrophysics. (in press). (2004)
[文献書誌] K.Seki: "Cold Ions in the Hot Plasma Sheet of Earth's Magnetotail"Nature. 422. 589-592 (2003)
[文献書誌] Asano, Y.: "Evolution of the Thin Current Sheet in a Substorm Observed by Geotail"J.Geophys.Res.. 108,A5. 2002JA009785 (2003)
[文献書誌] Perraut, S.: "Substorm Expansion Phase : Observations from Geotail, Polar and IMAGE network"J.Geophys.Res.. 108,A4. 1200JA009376 (2003)
[文献書誌] Shimada, N.: "Electron-Ion Coupling Dynamics in the Shock Transition Region"Plasma Physics. 10. 1113-1119 (2003)
[文献書誌] Terasawa, T.: ""Proton-Assisted Diffusive Shock Electron Acceleration? Lessons from Heliospheric Observations" in Extremely High Energy Cosmic Rays, edited by M.Teshima and T.Ebisuzaki"Universal Academy Press. 230 (2003)

2003 年度 実績報告書

宇宙線衝撃波加速過程の基礎的研究

研究代表者

寺沢 敏夫 東京大学, 大学院・理学系研究科, 教授 (30134662)

研究成果

[文献書誌] Iwamoto, S.: "Wien fireball model of relativistic outflows in active galactic nuclei"Astrophys.J.. 601(1)Part1. 78-89 (2004)

[文献書誌] Kataoka, J.: "Chandra discovery of an X-ray jet and lobes in 3C 15"Astron Astrophys.. 410(3). 833-845 (2003)

[文献書誌] Kusunose, M.: "The electron spectrum in 3C 279 and the observed emission spectrum"Astrophys.J.. 592(1)Part2. L5-L8 (2003)

[文献書誌] Kato, TN.: "Probabilistic description of the first-order Fermi acceleration in shock waves : time-dependent solution by the single-particle approach"Mon.Not.R.Astron.Soc.. 342(2). 639-650 (2003)

[文献書誌] Moriyasu, S.: "The Nonlinear Alfven wave model for solar coronal heating and nanoflares"Astrophys.J.. 601(1)Part2. L107-L110 (2004)

[文献書誌] Asano, K.: "Photon emission in a cascade from relativistic protons"Publ.Astron.Soc.Japan. 55(2). 433-444 (2003)

[文献書誌] Yokoyama, T.: "Microwave imaging observation of an electron steam in a solar flare"Adv.Space Res.. 32(12). 2517-2520 (2003)

[文献書誌] Asai, A.: "Evolution of flare ribbons and energy release"Adv.Space Res.. 32(12). 2561-2566 (2003)

[文献書誌] Kusano, K.: "Measurement of magnetic helicity flux into the solar corona"Adv.Space Res.. 32(10). 1917-1922 (2003)

[文献書誌] Kusano, K.: "Annihilation of magnetic helicity : A new model for solar flare onset"Adv.Space Res.. 32(10). 1931-1936 (2003)

[文献書誌] White, S.M.: "Radio and hard X-ray images of high-energy electrons in an X-class solar flare"Astrophys.J.. 595(2)Part2. L111-L114 (2003)

[文献書誌] Miyagoshi, T.: "Magnetohydrodynamic numerical simulations of solar X-ray jets based on the magnetic reconnection model that includes chromospheric evapporation"Astrophys.J.. 593(2) Part2. L133-L136 (2003)

[文献書誌] Bamert, K.: "Hydromagnetic wave excitation upstream of an interplanetary traveling shock"Astrophys.J.. 601(1)Part2. L99-L102 (2003)

[文献書誌] Terasawa, T.: "Astrophysical particle acceleration - Heliosphere as an astrophysical laboratory"Prog.Theor.Phys.Supp.. 151. 95-104 (2003)

[文献書誌] Yamasaki, R.: "Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN 1006 NE rim"Astron.Astrophys.. (in press). (2004)

[文献書誌] Nakata, K.: "Whistler waves in upstream region of interplanetary shocks"Adv.Space Res.. (in press). (2004)

[文献書誌] Oka, M.: "Quest for waves excited by interstellar Helium pickup ions"Adv.Space Res.. (in press). (2004)

[文献書誌] Terasawa, T.: "GEOTAIL observation of solar wind and interplanetary phenomena"Adv.Space Res.. (in press). (2004)

[文献書誌] Takei, Y.: "Solar gamma ray events detected by GEOTAIL plasma instrument"Proc.28th International Cosmic Ray Conference. 6. 3226-3233 (2003)

[文献書誌] Nakata, K.: "The 'proton-assisted' generation process of whistler waves at interplanetary shocks"Proc.28th International Cosmic Ray Conference. 6. 3670-3697 (2003)

[文献書誌] Terasawa, T.: "Acceleration at the Earth's Bow Shock : Spatial Dependence of Acceleration Efficiency"Proc.28th International Cosmic Ray Conference. 6. 3705-3708 (2003)

[文献書誌] Gloecker, G.: "Observations of the Helium focusing cone with pickup ions"Astron.Astrophys.. (in press). (2004)

[文献書誌] Moebius, E.: "Synopsis of the Interstellar He Parameters from Combined Neutral Gas: Pickup Ion and UV Scattering Observations and Related Consequences"Astronomy and Astrophysics. (in press). (2004)

[文献書誌] K.Seki: "Cold Ions in the Hot Plasma Sheet of Earth's Magnetotail"Nature. 422. 589-592 (2003)

[文献書誌] Asano, Y.: "Evolution of the Thin Current Sheet in a Substorm Observed by Geotail"J.Geophys.Res.. 108,A5. 2002JA009785 (2003)

[文献書誌] Perraut, S.: "Substorm Expansion Phase : Observations from Geotail, Polar and IMAGE network"J.Geophys.Res.. 108,A4. 1200JA009376 (2003)

[文献書誌] Shimada, N.: "Electron-Ion Coupling Dynamics in the Shock Transition Region"Plasma Physics. 10. 1113-1119 (2003)

[文献書誌] Terasawa, T.: ""Proton-Assisted Diffusive Shock Electron Acceleration? Lessons from Heliospheric Observations" in Extremely High Energy Cosmic Rays, edited by M.Teshima and T.Ebisuzaki"Universal Academy Press. 230 (2003)

2003 年度実績報告書

寺沢敏夫東京大学, 大学院・理学系研究科, 教授 (30134662)