Verification and development of the unified solar wind acceleration model

2008 Fiscal Year Final Research Report

• Project/Area Number: 19540473
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University
• Principal Investigator: KOJIMA Masayoshi Nagoya University, 太陽地球環境研究所, 名誉教授 (70023687)
• Co-Investigator(Kenkyū-buntansha): TOKUMAR Munetoshi 名古屋大学, 太陽地球環境研究所, 教授 (60273207) ; FUJIKI Ken-ichi 名古屋大学, 太陽地球環境研究所, 助教 (20303597)
• Project Period (FY): 2007 – 2008
• Keywords: 太陽風 / 加速機構 / 惑星間空間シンチレーション

Research Abstract

(1) 太陽から0.1 AUの距離においてはランダム速度の一因となる大きな波動が存在しない可能性がある.(2) 高速太陽風は0.1 AU以遠においても加速が継続している.(3) 加速効率を決定する磁場強度と流管拡大率の比は、コロナホール中で緯度と共に滑らかに変化し速度の緯度構造と似る.(4) 今太陽極小期の太陽極磁場は弱く、前サイクルに比べ高速太陽風の占める領域の比率が小さい。高緯度高速風領域の発達に極磁場強度の影響が考えられる。

Research Products

• [Journal Article] Interplanetary scintillation observations of the solar wind for space weather modeling (2009)
  • Author(s): Tokumaru, M., M. Kojima, and K. Fujiki
  • Journal Title: Space Technology Japan Vol. 8(in press)
  • Peer Reviewed
• [Journal Article] Non-dipolar solar wind structure observed in the cycle 23/24 minimum, Geophys (2009)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, and K. Hayashi
  • Journal Title: Res. Lett. doi : 10.1029 Pages: GL037461
  • Peer Reviewed
• [Journal Article] Relation between loop-shaped interplanetary disturbances and the magnetic flux rope (2009)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, K. Munakata, T. Kuwabara, and K. Marubashi
  • Journal Title: Advances in Geoscience (World Scientific Publishing Co., USA) Vol.3(in press)
  • Peer Reviewed
• [Journal Article] Solar wind and CME studies of the inner heliosphere using IPS data from STELAB, ORT and EISCAT (2009)
  • Author(s): Bisi, M.M., B.V. Jackson, F.A. Fallows, G.D. Dorrian, P.K. Manoharan, J.M. Clover, P.P. Hick, A. Buffington, A. R. Breen, M. Tokumaru
  • Journal Title: Advances in Geoscience (World Scientific Publishing Co., USA) Vol.3(in press)
  • Peer Reviewed
• [Journal Article] Origins and properties of the quasi-stationary slow solar wind (2008)
  • Author(s): Eselevich, M. V., V. G. Eselevich, K. Fujiki
  • Journal Title: Astronomy Reports 52-7 Pages: 576-589
  • Peer Reviewed
• [Journal Article] Source regions of solar wind disappearance events (2008)
  • Author(s): Janardhan, P., K. Fujiki, H.S. Sawant, M. Kojima, K. Hakamada, R. Krishnan
  • Journal Title: J. Geophys. Res Vol. 113, No. A3 Pages: A03102
  • Peer Reviewed
• [Journal Article] Streamer belt and chains as the main sources of quasi-stationary slow solar wind (2007)
  • Author(s): Eselevich, M., V. Eselevich, and K. Fujiki
  • Journal Title: Solar Phys 240 Pages: 135-151
  • Peer Reviewed
• [Journal Article] The source and propagation of the interplanetary disturbance associated with the full-halo coronal mass ejection on 28 October 2003 (2007)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, M. Yamashita, and B. V. Jackson
  • Journal Title: J. Geophys. Res 112 Pages: A05106
  • Peer Reviewed
• [Journal Article] IPS tomographic observations of 3D solar wind structure (2007)
  • Author(s): Kojima, M., M. Tokumaru, K. Fujiki, K. Hayashi, and B. V. Jackson
  • Journal Title: Astronomical and Astrophysical Transactions 26 Pages: 467-476
  • Peer Reviewed
• [Journal Article] Comparison of the extent and mass of CME events in the interplanetary medium using IPS and SMEI Thomson scattering observations (2007)
  • Author(s): Jackson, B.V., P.P. Hick, A. Buffington, M.M. Bisi, M. Kojima, and M. Tokumaru
  • Journal Title: Astronomical & Astrophysical Transactions 26 Pages: 477-487
  • Peer Reviewed
• [Journal Article] What coronal parameters determine solar wind speed? (2007)
  • Author(s): Kojima, M., M. Tokumaru, K. Fujiki, H. Itoh, T. Murakami, and K. Hakamada
  • Journal Title: in "New Solar Physics with Solar-B Mission", ASP Conference Series, eds K. Shibata, S. Nagata, and T. Sakurai Vol.369 Pages: 549-555
  • Peer Reviewed
• [Journal Article] The source and propagation of the interplanetary disturbance associated with the full-halo coronal mass ejection on 2003 October 28 (2007)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, M. Yamashita, and B. V. Jackson
  • Journal Title: J. Geophys. Res. doi : 10.1029/2006JA012043
  • Peer Reviewed
• [Presentation] 極域コロナルホール・静穏コロナ・赤道域コロナホールの光球磁場構造とその中長期変動 (2009)
  • Author(s): 伊藤大晃, 塩田大幸, 常田佐久, 徳丸宗利, 藤木謙一
  • Organizer: 天文学会2009年春期年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20090324-27
• [Presentation] Is the polar region different from the quiet region of the Sun? (2008)
  • Author(s): Ito, H., S. Tsuneta, D. Shiota, M. Tokumaru, K. Fujiki
  • Organizer: AGU 2008 fall meeting, Moscone center
  • Place of Presentation: サンフランシスコ・米国
  • Year and Date: 20081215-19
• [Presentation] Solar wind studies with multi-station interplanetary scintillation observation, International Symposium : Fifty Years after IGY-Modern Information Technologies and Earth and Solar Sciences (2008)
  • Author(s): Fujiki, K., M. Kojima, M. Tokumaru
  • Organizer: National Institute of Advanced Industrial Science and Technology (AIST)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
  • Year and Date: 20081110-13
• [Presentation] 「「ひので」と惑星間空間シンチレーション観測を用いた極域磁場と太陽風構造」 (2008)
  • Author(s): 伊藤大晃, 塩田大幸, 常田佐久, 徳丸宗利, 藤木謙一
  • Organizer: 2008年秋期年会
  • Place of Presentation: 天文学会
  • Year and Date: 20080911-13
• [Presentation] 惑星間空間シンチレーション観測を用いた太陽風予報精度の検証 (2008)
  • Author(s): 伊藤大晃, 藤木謙一, 小島正宜, 徳丸宗利, 大見智亮
  • Organizer: 2008年地球惑星科学関連学会合同大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉)
  • Year and Date: 20080525-30
• [Presentation] Unusual solar wind structure observed during the 2008 sunspot minimum (2008)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, K. Hayashi
  • Organizer: AGU 2008 fall meeting, Moscone center
  • Place of Presentation: サンフランシスコ・米国
  • Year and Date: 2008-12-16
• [Presentation] 2008太陽黒点極小期において観測された特異な太陽風構造 (2008)
  • Author(s): 徳丸宗利, 小島正宜, 藤木謙一, 伊藤大晃, 林啓志
  • Organizer: 第124回地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: 仙台市戦災復興記念館(宮城)
  • Year and Date: 2008-10-12
• [Presentation] Relation between Loop-Shaped Interplanetary Disturbances and the Magnetic Flux Rope (2008)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki, K. Munakata, T. Kuwabara, and K. Marubashi
  • Organizer: AOGS 2008, BEXCO
  • Place of Presentation: 釜山, 韓国
  • Year and Date: 2008-06-18
• [Presentation] Solar Wind Observations and Space Weather (2008)
  • Author(s): Tokumaru, M., M. Kojima, K. Fujiki
  • Organizer: The 26th International Symposium on Space Technology and Science
  • Place of Presentation: アクトシティ浜松(静岡)
  • Year and Date: 2008-06-03
• [Presentation] 太陽圏イメージング装置(SWIFT)の開発 (2008)
  • Author(s): 徳丸宗利, 小島正宜, 藤木謙一, 伊藤大晃
  • Organizer: 「太陽圏イメージング装置(SWIFT)の開発」, 2008年地球惑星科学関連学会合同大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉)
  • Year and Date: 2008-05-25
• [Presentation] Solar wind structure-origin and solar cycle dependence (2007)
  • Author(s): Kojima, M., M. Tokumaru, and K. Fujiki, H. Itoh
  • Organizer: International CAWSES Symposium, Kyoto
  • Place of Presentation: Japan
  • Year and Date: 20071023-27
• [Presentation] Propagation of coronal mass ejections in the interplanetary mediumi (2007)
  • Author(s): Tokumaru, M., M. Kojima, and K. Fujiki
  • Organizer: International CAWSES Symposium, P1-047
  • Place of Presentation: Kyoto University Clock Tower Centennial Hall, Kyoto
  • Year and Date: 20071023-27
• [Presentation] Solar wind observations with interplanetary scintillation at 327 MHz (2007)
  • Author(s): Fujiki, K., M. Kojima, M. Tokumaru
  • Organizer: International CAWSES Symposium, P1-047
  • Place of Presentation: Kyoto University Clock Tower Centennial Hall, Kyoto
  • Year and Date: 20071023-27
• [Presentation] 惑星間空間におけるCMEの伝搬 (2007)
  • Author(s): 徳丸宗利, 小島正宜, 藤木謙一
  • Organizer: 第122回地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: 名古屋大学(名古屋)
  • Year and Date: 20070928-1001
• [Presentation] Solar cycle dependence of solar wind structure (2007)
  • Author(s): Kojima, M. M. Tokumaru, and K. Fujiki
  • Organizer: AOGS 4th Annual Meeting
  • Place of Presentation: Bangkok
  • Year and Date: 20070730-0804
• [Presentation] Solar cycle dependence of solar wind structure (2007)
  • Author(s): Kojima, M., M. Tokumaru, and K. Fujiki
  • Organizer: IUGG 24th General Assembly
  • Place of Presentation: Perugia, Italy
  • Year and Date: 20070702-13
• [Presentation] 惑星間空間シンチレーション新観測法を用いた太陽風研究 (2007)
  • Author(s): 小島正宜, 徳丸宗利, 藤木謙一
  • Organizer: 地球惑星科学関連学会2007年合同大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 20070519-24
• [Presentation] 内部太陽圏におけるCMEの伝搬-2003年11月2日イベントに対するIPS観測結果 (2007)
  • Author(s): 徳丸宗利, 小島正宜, 藤木謙一, 山下真弘
  • Organizer: 2007年地球惑星科学関連学会合同大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉)(E108-009)
  • Year and Date: 20070519-24
• [Presentation] 2008太陽黒点極小期において観測された特異な太陽風構造 (2007)
  • Author(s): 徳丸宗利, 小島正宜, 藤木謙一, 伊藤大晃, 林啓志
  • Organizer: 第122回 地球電磁気・地球惑星圏学会 総会および講演会
  • Place of Presentation: 名古屋大学(東山キャンパス)
  • Year and Date: 2007-10-12
• [Presentation] 国際共同による惑星間空間シンチレーション観測 (2007)
  • Author(s): 藤木謙一, 小島正宜, 徳丸宗利
  • Organizer: 第122回 地球電磁気・地球惑星圏学会 総会および講演会
  • Place of Presentation: 名古屋大学(東山キャンパス)
  • Year and Date: 2007-10-11