NAOC Open IR  > 太阳物理研究部
Propagation of Moreton Waves
Zhang, Yuzong1,2,3; Kitai, Reizaburo1,2; Narukage, Noriyuki4; Matsumoto, Takuma1,2; UeNo, Satoru1,2; Shibata, Kazunari1,2; Wang, Jingxiu3
AbstractWith the Flare-Monitoring Telescope (FMT) and Solar Magnetic Activity Research Telescope (SMART) at Hida observatory of Kyoto University, 13 events of Moreton waves were captured at Ha center, H alpha +/- 0.5 angstrom, and H alpha +/- 0.8 angstrom wavebands since 1997. With such samples, we have studied the statistical properties of the propagation of Moreton waves. Moreton waves were all restricted in sectorial zones with a mean value of 92 degrees. However, their accompanying EIT waves, observed simultaneously with SOHO/EIT at extreme-ultraviolet wavelength, were very isotropic with a quite extended scope of 193 degrees. The average propagation speeds of the Moreton waves and the corresponding EIT waves were 664 km s(-1) and 205 km s(-1), respectively. Moreton waves propagated either under large-scale close magnetic flux loops, or firstly in the sectorial region where two sets of magnetic loops separated from each other and diverged, and then stopped before the open magnetic flux region. The location swept by Moreton waves had a relatively weak magnetic field as compared to the magnetic fields at their sidewalls. The ratio of the magnetic flux density between the sidewall and the path falls in the range of 1.4 to 3.7 at a height of 0.01 solar radii. Additionally, we roughly estimated the distribution of the fast magnetosonic speed between the propagating path and sidewalls in an event on 1997 November 3, and found a relatively low-fast magnetosonic speed in the path. We also found that the propagating direction of Moreton waves coincided with the direction of filament eruption in a few well-observed events. This favors an interpretation of the "Piston" model, although further studies are necessary for any definitive conclusion.
KeywordShock Waves Sun: Chromosphere Sun: Corona Sun: Flares Sun: Magnetic Fields
Indexed BySCI
WOS IDWOS:000292623400018
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Document Type期刊论文
Affiliation1.Kyoto Univ, Kwasan Observ, Yamashina Ku, Kyoto 6078471, Japan
2.Kyoto Univ, Hida Observ, Yamashina Ku, Kyoto 6078471, Japan
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China
4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan
Recommended Citation
GB/T 7714
Zhang, Yuzong,Kitai, Reizaburo,Narukage, Noriyuki,et al. Propagation of Moreton Waves[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2011,63(3):685-696.
APA Zhang, Yuzong.,Kitai, Reizaburo.,Narukage, Noriyuki.,Matsumoto, Takuma.,UeNo, Satoru.,...&Wang, Jingxiu.(2011).Propagation of Moreton Waves.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,63(3),685-696.
MLA Zhang, Yuzong,et al."Propagation of Moreton Waves".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63.3(2011):685-696.
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