HR: 16:20h
AN: SH24A-04    [Abstracts]
TI: What Determines the Solar Wind Speed ?
AU: * Suzuki, T K
EM: stakeru@scphys.kyoto-u.ac.jp
AF: Department of Physics, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502 Japan
AU: Fujiki, K
EM: fujiki@stelab.nagoya-u.ac.jp
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Kojima, M
EM: kojima@stelab.nagoya-u.ac.jp
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Tokumaru, M
EM: tokumaru@stelab.nagoya-u.ac.jp
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Hirano, M
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Baba, D
EM: baba@stelab.nagoya-u.ac.jp
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Yamasita, M
EM: yamasita@stelab.nagoya-u.ac.jp
AF: STE laboratory, Nagoya university, 3-13, Honohara, Toyokawa, 442-8507 Japan
AU: Hakamada, K
AF: Department of Natural Science, Chubu University, 1200, Matsumoto, Kasugai, Japan
AB: Recent observations by Interplanetary Scintillation measurements by Nagoya-STEL group (Hirano et al.2003; Kojima et al.2004) show that solar wind speed is well-correlated with B/f, where B is radial magnetic field strength at the solar surface and f is a super-radial expansion factor of open flux tubes. We show that this correlation is nicely explained by dissipation of Alfven waves no matter what types of the wave dissipation processes operate. B determines the input energy flux of Alfven waves and f controls adiabatic loss of the wave energy, so that B/f is an important control parameter which determines the solar wind speed. (reference ) [1] Hirano, M., Kojima, M., Tokumaru, M., Fujiki, K., Ohmi, T., Yamashita, M, Hakamada, K., and Hayashi, K. 2003,, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract SH21B-0164 [2] Kojima, M., K. Fujiki, M. Hirano, M. Tokumaru, T. Ohmi, and K. Hakamada, 2004, "The Sun and the heliosphere as an Integrated System", Giannina Poletto and Steven T. Suess, Eds. Kluwer Academic Publishers, in press
DE: 2149 MHD waves and turbulence
DE: 2169 Sources of the solar wind
DE: 3210 Modeling
DE: 7511 Coronal holes
DE: 7827 Kinetic and MHD theory
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly