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1996 Fiscal Year Final Research Report Summary

Magnetic Field Evolution and Solar Flares

Research Project

Project/Area Number 08044104
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionNational Astronomical Observatory

Principal Investigator

SAKURAI Takashi  National Astronomical Observatory Solar Physics Division, professor, 太陽物理学研究系, 教授 (40114491)

Co-Investigator(Kenkyū-buntansha) WANG Huaning  Beijing Observatory, Research Associate, 助手
TANG Yuhua  Nanjing University, Associate Professor, 助教授
FANG Cheng  Nanjing University, Professor, 教授
ZHANG Hongqi  Beijing Observatory, Professor, 教授
AI Guoxiang  Beijing Observatory, Professor, 教授
KUROKAWA Hiroki  Kyoto University, Faculty of Science Professor, 理学部, 教授 (80135508)
KOSUGI Takeo  National Astronomical Observatory Radio Astronomy Division, Professor, 電波天文学研究系, 教授 (70107473)
ICHIMOTO Kiyoshi  National Astronomical Observatory Solar Physics Division, Associate Professor, 太陽物理学研究系, 助教授 (70193456)
SUEMATSU Yoshinori  National Astronomical Observatory Solar Physics Division, Associate Professor, 太陽物理学研究系, 助教授 (50171111)
TSUNETA Saku  National Astronomical Observatory Solar Physics Division, Professor, 太陽物理学研究系, 教授 (50188603)
Project Period (FY) 1996
KeywordsSun / Solar Physics / Sunspots / Solar Corona / Solar Magnetic Fields / Solar X-rays / Magnetohydrodynamics / Instrumentation
Research Abstract

The aim of this project is to study solar coronal phenomena, particularly solar flares, by combining the X-ray data from the YOHKOH satellite and the ground-based optical observations. T.Sakurai visited Beijing and Nanjing and discussed instrumentation for the observations of the sun. We invited four Chinese scientists to Tokyo. H.Zhang studied a three-dimensional configuration of solar flares observed consecutively at the limb and on the disk. C.Fang studied the magnetic field structure and coronal heating properties of an active region. Y.Tang studied the magnetohydrodynamical instability of solar prominences. H.Wang studied the expansion of coronal magnetic fields with height and compared the results with the X-ray observations.

  • Research Products

    (50 results)

All Other

All Publications (50 results)

  • [Publications] M.J.Aschwanden,et al.: "Electron Time-of-Flight Distances and Flare Loop Geometries Compared from CGRO and Yohkoh Observations" Astrophys. J.468. 398-417 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.J.Aschwanden,et al.: "The Scaling Law between Electron Time-of-Flight Distances and Loop Lenghts in Solar Flares" Astrophys. J.470. 1198-1217 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Brajsa,et al.: "Helium 10830 Angstrom Measurements of the Sun" Solar Phys.163. 79-91 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Brajsa,et al.: "Coronal Holes Detected Using Solar Microwave Measurements" Astron. Soc. Pacific Conference Series. (submitted). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.D.Ding,et al.: "Chromospheric Evaporation in Four Solar Flares Observed by Yohkoh" Astrophs. J.458. 391-396 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.Fang,M.Ding,and J.C.Henoux: "Particle Beam Diagnostics Based on UV and Optical Spectra of Solar Flares" Proc. SOLTIP3 Symposium. (submitted). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ichimoto,et al.: "Measurement of Coronal Electron Temperature at the Total Eclipse on 1994 November3" Publ. Astron. Soc. Japan. 48. 545-554 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ichimoto,et al.: "Measurement of the Coronal Electron Temperature at the Total Eclipse on 3rd Nov.1994" Magnetodynamic Phenomena in the Solar Atmosphere--Prototypes of Stellar Magnetic Activity. 413-414 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nagata,et al.: "High Wavelength Resolution XUV Multilayer Mirror" Applied Optics. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Nishio,et al: "Magnetic Field Configuration in Impulsive Solar Flares Inferred from Colalined Microwave/X-ray Images" Astrophys. J.(submitted). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Okubo,et al.: "X-ray and Magnetic Features of H-alpha Surges" Magnetodynamic Phenomena in the Solar Atmosphere--Prototypes Stellar Magnetic Activity. 437-438 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ozaki,et al.: "A New High Thermal-Conductivity Material for High Precision Space Optics" Proc. SPIE 2804. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sakao,et al.: "Japanese Sounding Rocket Experiment with the Solar XUV Doppler Telescope" Proc. SPIE 2804. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sakurai: "Heating Mechanisms of the Solar Corona" Magnetodynamic Phenomena in the Solar Atmosphere--Prototypes of Stellar Magnetic Activity. 21-27 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sakurai and J.C.Chae: "Maximum Energy of Force-Free Magnetic Fields" Magnetodynamic Phenomena in the Solar Atmosphere--Prototypes of Stellar Magnetic Activity. 579-580 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sakurai,et al.: "STEP Project Team 1 (Solar Activity) : Team Report" STEP GBRSC News 6-1. 2-5 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] B.V.Somov and T.Kosugi: "Collisionless Reconnection and High Energy Particle Acceleration in Solar Flares" Astrophys. J.(submitted). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Takahashi,et al.: "The Solar Flare of 1992 August 17 23:58 UT" Publ. Astron. Soc. Japan. 48. 857-863 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tang,et al.: "Filament Current Systems and Solar Flares" Solar Phys.(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Tsuneta: "Magnetic Reconnection : Open Issues" PASP Conf. series. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Tsuneta,et al.: "Hot and Super-Hot Plasmas above an Impulsive Flare Loop" Astrophys. J.(in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] P.Venkatakrishnan,et al.: "Enhanced He I Absorption at the Feet of X-ray Loops" Publ. Astron. Sco. Japan. 48. L1-L4 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Zhang: "Spatial Configuration of Highly Sheared Magnetic Structures in Active region NOAA 6659 in 1991 June" Astrophys. J.471. 1049-1057 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Zhang: "Magnetic Configuration of a Sunspot Region Using the H-beta Line" Astron. Astrophys. Suppl.119. 1-6 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Zhao,C.Fang,and M.D.Ding: "Analysis of 2D H-alpha Spectra and Magnetic Field during the Impulsive Phase of a Solar Flare" Solar Phys.(submitted). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.J.Aschwarden, et al.: "Electron Time-of-Flight Distances and Flare Loop Geometries Compared from CGRO and Yohkoh Observations" Astrophys.J.468. 398-417 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.J.Aschwanden, et al.: "The Scaling Law between Electron Time-of-Flight Distances and Loop Lengths in Solar Flares" Astrophys.J.470. 1198-1217 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Brajsa, et al.: "Helium 10830 Angstrom Measurements of the Sun" Solar Phys.163. 79-91 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Brajsa, et al.: "Coronal Holes Detected Using Solar Microwave Measurements" in 'Radio Emission from the Stars and the Sun', eds. J.M.Paredes and R.Taylor, Astron.Soc. Pacific Conference Series.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.D.Ding, et al.: "Chromospheric Evaporation in Four Solar Flares Observed by Yohkoh" Astrophys.J.458. 391-396 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Fang, M.Ding, and J.C.Henoux: "Particle Beam Diagnostics Based on UV and Optical Spectra of Solar Flares" Proc.SOLTIP3 Symposium. (submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ichimoto, et al.: "Measurement of Coronal Electron Temperature at the Total Eclipse on 1994 November 3" Publ.Astrom.Soc.Japan. 48. 545-554 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ichimoto, et al.: "Measurement of the Coronal Electron Temperature at the Total Eclipse on 3rd Nov.1994" in 'Magnetodynamic Phenomena the Solar Atmosphere-Prototypes of Stellar Magnetic Activity', IAU Colloquium No.153, eds. Y.Uchida, T.Kosugi, and H.S.Hudson. 413-414 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Nagata, et al.: "High Wavelength Resolution XUV Multilayr Mirror" Applied Optics. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Nishio, et al.: "Magnetic Field Configuration in Impulsive Solar Flares Inferred from Colaligned Microwave/X-ray Images" Astrophys.J.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Okubo, et al.: "X-ray and Magnetic Features of H-alpha Surges" in 'Magnetodynamic Phenomena in the Solar Atmosphere-Prototypes of Stellar Magnetic Activity', IAU Colloquium No.153, eds. Y.Uchida, T.Kosugi, and H.S.Hudson. 437-438 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ozaki, et al.: "A New High Thermal-Conductivity Material for High Precision Space Optics" Proc. SPIE 2804. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sakao, et al.: "Japanese Sounding Rocket Experiment with the Solar XUV Doppler Telescope" Proc. SPIE 2804. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sakurai: "Heating Mechanisms of the Solar Corona" in 'Magnetodynamic Phenomena in the Solar Atmosphere-Prototypes of Stellar Magnetic Activity', IAU Colloquium No.153, eds. Y.Uchida, T.Kosugi, and H.S.Hudson. 21-27 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sakurai and J.C.Chae: "Maximum Energy of Force-Free Magnetic Fields" in 'Magnetodynamic Phenomena in the Solar Atmosphere-Prototypes of Stellar Magnetic Activity', IAU Colloquium No.153, eds. Y.Uchida, T.Kosugi, and H.S.Hudson. 579-580 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sakurai, et al.: "STEP Project Team 1 (Solar Activity) : Team Report" SYEP GBRSC News. 6-1. 2-5 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B.V.Somov and T.Kosugi: "Collisionless Reconnection and High Energy Particle Acceleration in Solar Flares" Astrophys.J.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Takahashi, et al.: "The Solar Flare of 1992 August 17 23 : 58 UT" Publ.Astron.Soc.Japan.48. 857-863 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tang, et al.: "Filament Current Systems and Solar Flares" Solar Phys.(in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Tsuneta: "Magnetic Reconnection : Open Issues" Proc.Yohkoh Conference on Observations of Magnetic Reconnection in the Solar Atmosphere, eds. B.Bentley and J.Mariska, PASP Conf. series.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Tsuneta et al.: "Hot and Super-Hot Plasmas above an Impulsive Flare Loop" Astrophys.J.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] P.Venkatakrishnan, et al.: "Enhanced He I Absorption at the Feet of X-ray Loops" Publ.Astron.Soc.Japan.48. L1-L4 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Zhang: "Spatial Configuration of Highly Sheared Magnetic Structures in Active Region NOAA 6659 in 1991 June" Astrophys.J.471. 1049-1057 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Zhang: "Magnetic Configuration of a Sunspot Region Using the H-beta Line" Astron.Astrophys.Suppl.119. 1-6 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.Zhao, C.Fang, and M.D.Ding: "Analysis of 2D H-alpha Spectra and Magnetic Field during the Impulsive Phase.of a Solar Flare" Solar Phys.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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