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Observational Research of Plasma Ejection Mechanism in Solar Emerging Flux Region.

Research Project

Project/Area Number 11640234
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KUROKAWA Hiroki  KYOTO UNIVERSITY Graduate School of Science Proffessor, 大学院・理学研究科, 教授 (80135508)

Co-Investigator(Kenkyū-buntansha) UENO Satoru  KYOTO UNIVERSITY Graduate School of Science Research Associo, 大学院・理学研究科, 助手 (70303807)
KITAI Reizaburou  KYOTO UNIVERSITY Graduate School of Science Associte.Prof., 大学院・理学研究科, 助教授 (40169850)
SHIBATA Kazunari  KYOTO UNIVERSITY Graduate School of Science Proffessor, 大学院・理学研究科, 教授 (70144178)
YOSHIMURA Keiji  KYOTO UNIVERSITY Graduate School of Science Posdoc.Research, 大学院・理学研究科, 機関研究員
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsSun / Plasma Ejection / Hα Surge / Solar Flare / Solar Active Region / Magnetic Field Reconnection / Emerging Flux Region / 太陽プラズマ / 太陽磁気浮上領域 / 太陽焦点領域 / 捩れた磁束管浮上 / 太陽プラズマ噴出機構 / 太陽コロナループ / 太陽磁気再結合
Research Abstract

During the period of this research project, we made several coordinated observations of solar explosive phenomena, or Hα surges, X-ray jets, EUV jets and flares in multiple wavelengths by simultaneously using the Domeless Solar Telescope of Hida Observatory and TRACE satellite. We got the following new results which all strongly support the magnetic reconnection model for explosive ejections of solar plasma.
(1)From the high resolution observation of Hα surges with the Domeless Solar Telescope at Hida Observatory, Kyoto University, we found two kinds of downward-moving features in the Hα surge regions. One is along the same magnetic field line as that of the upward-moving feature. The other streams are along a different magnetic field line where no upward-moving feature was found. It was shown that these two kinds of downward-moving features along the different magnetic field lines are wellexplained by a magnetic field reconnection between emerging flux loops and pre-existing coronal ma … More gnetic field.
(2)At the coodinated observation in August 1999, we succeeded to observe an emerging flux region appearing just on the solar limb simultaneously at Hida observatory and TRACE satellite. From the analyses of these data, we found that high temperature(one-million degrees)plasma jets in 171Å are ejected simultaneously with cool Hα and Lα surges. Expanding loops and shrinking loops are also found both in 171Å and Lα images. These phenomena were all explained by the magnetic field reconection.
(3)Conspicuous activities of plasma ejections along a light bridge of a stable sunspot were, for the first time, observed simultaneously in Hα and in 1716Å. We found that(a)the times and velocities of the 171Å ejections are the same as those of Hα ejections and that(b)the appearance of the ejections are different from one another ; i.e., the Hα ejections have a jetlike, while the 171Å are like loops.
(4)A flare productive active region NOAA 9026, which produced three X-class flares on 6-7 June, were successufully observed in the coordinated observation among Hida, La Palma, and TRACE.From detailed analyses of the region we found that a strongly-twisted emerging magnetic flux rope produced strong flares when it slipped out from the photosphere into the corona. Less

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] 黒河宏企 他: "Emergence and Drastic Break-down of a Twisted Flax Rope Triggering Strong Solar Flares in an Active Region NOAA 9026"Astrophys.Journal. (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 下条圭美,黒河宏企 他: "Dynamical Features and Evolutional Characteristics of Brightening Coronal Loops"Solar Physics. (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 浅井、黒河宏企 他: "Plasma Ejections from a Light Bridge in a Sunspot Umbra"Astrophysical Journal Letters. 555. L65-L68 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 黒河宏企,佐野周作: "Hα surges in Emerging Flux Regions as an Evidence of Magnetic Field Reconnection"Advanced Space Res.. 26. 441-444 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 黒河宏企,吉村圭司: "Relationship between Hα AFS Loops and Soft X-ray Brightening Loops in Emerging Flux Regions"Advanced Space Rec.. 25. 1825-1828 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 石井貴子,黒河宏企: "Emergence of Twisted Magnetic Flux Bundles and Flare Activity in a Large Active Region NOAA4201"Publ.Astronomical Society of Japan. 52. 337-354 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kurokawa, H., Wang, T and Ishii, T.T.: "Emergence and Drastic Break-down of a Twisted Flux Rope Triggering Strong Solar Flares in an Active Region NOAA 9026"Astrophys.J.. (to be published). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shimojo, M., Kurokawa, H., Yoshimura, K.: "Dynamical Features and Evolutional Characteristics of Brightening Coronal Loops"Solar Physics. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Asai, A., Ishii, T.T., and Kurokawa, H.: "Plasma Ejections from a Light Bridge in a Sunspot Umbra"Astrophys.J.. vol.555. L65-L68 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ishii, T.T., Takeuchi, T.T., & Kurokawa, H.: "Active Region Evolutions and Flare Activities : From the Photosphere to the Corona"in the proceedings of 'Recent Insights into the Physics of the Sun and Heliosphere : Highlights from SOHO and Other Space Missions', IAU Symposium. 203. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kurokawa H.and Sano S.: "Hα Surges in Emerging Flux Regions as an Evidence of Magnetic Field Reconnection."Advanced Space Res.. Vol.26. 441-444 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kurokawa H.and Yoshimura K.: "Relationship between Hα AFS Loops and Soft X-ray Brightening Loops in Emerging Flux Regions"Advanced Sapce Res.. Vol.25. 1825-1828 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ishii, T,T., Kurokawa, H., & Takeuchi, T,T: "Emergence of Twisted Magnetic Flux Bundles and Flare Activity in a Large Active Region NOAA 4201"Publ.Astron.Soc.Japan. vol.52. 337 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takeda A., Kurokawa H., R.Kitai, and K.Ishiura: "Contribution and Properties of the Green- and Red-Line Coronal Loops in the K-Corona"Publ.Astron.Soc.Japan. vol.52. 375-391 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Zhang, H.Q., Sakurai, T., Shibata, K., Shimojo, M., Kurokawa, H.: "Soft X-ray Flares and Magnetic Configuration in a Solar Active Region in February 1992"Astronomy and Astrophysics. vol.357. 725-734 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kitai, R., Kurokawa, H., Funakoshi, Y., Ishiura, K., and Shinkawa, T.: "An Observational Search for Giant Cells in the Sun"Adv.Space.Res.. Vol 24. 237-239 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takeda, A,., Kurokawa, H., Kitai, R.and Ishiura, K.: "Density Structure of the Coronal Loops Derived from the 1991 Total Eclipse Observation"ASP Conference Series, Proc.of International Symposium, The Last Solar Total Eclipse in the Millennium. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 大山政光,M.Ohyama 他: "Timing and occurrence rate of X-ray plasma ejections"journal of Atmospheric and Solar-Terrestrial Physics. 62. 1509-1514 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Zhang Honqi 他: "Soft X-ray flares and magnetic configuration in a solar active region in a solar active region in February,1992"Astrononomy and Astrophysics. 357. 725-734 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 上野悟 他: "Megnetic Field Evolution leading to solar flares I.Cases with low magnetic shear and mignetic Emergence"Publ.Astron.Soc.Japan. 52. 465-481 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Chen,柴田一成: "An emerging flux trigger"Ap.J.(Astrophysical journal). 545(未定). (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 石井貴子,黒河宏企: "Emergence of twisted magnetic-flux bundles and flare activity in a large active region, NOAA 4201"Publ.Astron.Soc.Japan. 52. 337-354 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 黒河宏企,佐野周作: "Hα Surges in Emerging Flux Regions as an Evidence of Magnetic field Recannection connefion connetion"Adv.Space Res.. Vol.26 No.3. 441-444 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 黒河宏企,吉村圭司: "Relationship between Hα AFS Loops and Soft X-ray Brightening Loops in Emerging Flux Regiors"Adv.Space Res.. Vol.25 No.9. 1825-1828 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 武田秋,黒河宏企 他2名: "Contributions and Properties of the Green-and Red-Line coronal Loops in the K-Corona"Publ.Astronomical Soc.Japan. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 石井貴子,黒河宏企 他1名: "Emergence of Twisted Magnetic Flux Bundles and Flare Activity in a Large Active Region NOAA 4201"Publ.Astron.Soc.Japan. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 北井礼三郎,黒河宏企 他3名: "An Observational Search for Giant Cells in the Sun"Adv.Space Res.. Vol.24. 237-239 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 武田秋,黒河宏企 他2名: "Density Structure of the Coronal Loops and Their Contributions to the K-corona"ASP Conference Series,Proc.of International Symp.. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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