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南京大学天文系 chenpf@nju

日冕 EIT 波的观测特征 及其模型. 陈鹏飞 P. F. Chen. 南京大学天文系 chenpf@nju.edu.cn. July 29, 2010 @ Shanghai. 纲要. SOHO 时代：  EIT 波的观测特征  EIT 波的理论模型 STEREO 时代 Hinode 时代 SDO 时代. Moreton 波. Optical Observation. Moreton et al. (1961). Moreton waves are associated with big flares

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南京大学天文系 chenpf@nju

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  1. 日冕EIT波的观测特征 及其模型 陈鹏飞 P. F. Chen 南京大学天文系 chenpf@nju.edu.cn July 29, 2010 @ Shanghai

  2. 纲要 SOHO时代： EIT波的观测特征 EIT波的理论模型 STEREO时代 Hinode时代 SDO时代

  3. Moreton波 Optical Observation Moreton et al. (1961) Moretonwaves are associated with big flares Propagation velocity: 500-2000 km/s Propagation distance: 5105 km H+0.8Å Credit: Kyoto University colleagues Theoretical Explanation Uchida (1968; 1974): Fast-mode wave in the corona

  4. EIT波的发现 SOHO/EIT Thompson et al. (1998) • Circular V=250 km/s 1997 May 12

  5. EIT波和暗区 共生现象

  6. 典型特征 Stop at separatrix or CH ( Delannee 2000; Thompson et al. 1999) Avoid ARs & MILs (Thompson et al. 1999)

  7. 争论焦点 1. 谁驱动了EIT波? 耀斑 vs. CME 2. EIT波的本质是什么？ 快波、慢波，还是非波

  8. 1. 驱动源之争 耀斑起源 Wu et al. (2001),Warmuth et al. (2004), Vrsnak et al. (2002), Vrsnak et al. (2006) …… 理由： 表象 + Uchida (1968)的误导

  9. 1. 驱动源之争 CME起源 Thompson et al. (2000), Biesecker et al. (2002), Kay et al. (2003), Cliver et al. (2005), Chen et al. (2002, 2005) , Chen (2006) 理由: 只要有EIT波，便有CME Biesecker et al. (2002) 一半EIT波对应B级耀斑 Cliver et al. (2005) 若无CME，虽X级耀斑无EIT波 Chen (2006) EIT波旋转与暗条旋转一致 Attril et al. (2007) EIT波与CME亮环重合 Chen (2009)

  10. 2. EIT波本质之争 Slow-mode wave VEIT>Cs MHD waves density Alfven wave Fast-mode wave ?

  11. 2. EIT波本质之争 快波模型 coronal Moreton wave Thompson et al. (1998) Y.-M. Wang (2000) Wu et al. （2001）Zheng et al. (2002) Ofman （2003） Warmuth & Mann (2005), Grechnev et al. 2008; Pomoell et al. (2008), Veronig et al., (2008), Gopalswamy et al. (2009), Long et al. (2009), Patsourakos et al., 2009; Kienreich et al. (2009), ……

  12. 快波模型的缺陷 1. VEIT仅日冕快波的 ~1/3 Klassen et al. (2000) Eto et al. (2002) Wills-Davey et al. (2007) Moreton waves 2. EIT波停在磁分隔面处 Delannee & Aulanier (1999) Thompson et al. (1999) Delannee et al. (2009) Attril (2010)

  13. 快波模型的缺陷 3. VEIT 和Vtype II burst无相关性 Klassen et al. (2000) 4. VEIT << 日冕声速 Long et al. (2009) Zhukov et al. (2009)

  14. 快波模型的缺陷 5. EIT波在活动区附近加速 Long et al. (2009) 6. 在暗区存在强外流 Harra & Sterling (2003) 7. EIT波和CME亮环重合 Chen (2009) Dai et al. (2009)

  15. 我们的磁拉伸模型 Chen, Wu, Shibata, & Fang 2002, ApJ, 572, L99 250 km/s 775 km/s

  16. 我们的磁拉伸模型 t1 t2 t3 t2

  17. Chen, Fang, & Shibata (2005) 其它困惑 EIT wave Moreton

  18. Chen (2009, Sci. in China (G), 52, 1785) 其它困惑 EIT 波在活动区附近加速

  19. EIT波的全面图像 Chen et al. (2002) 1. Coronal Moreton waves due to piston-driven shock 2. Diffuse “EIT waves” due to successive opening of closed field lines. Harra & Sterling (2003)

  20. EIT波的其它模型 逐步磁重联模型 Attril et al. (2007) Wills-Davey et al. (2007), Wang et al. (2009) 慢（孤立）波模型 See Wills-Davey & Attrill (2009) and Gallagher & Long (2010) for reviews

  21. STEREO时代 Patsourakos et al. (2009a, 2009b) 认为找到快波的证据 Gopalswamy et al. (2009) 认为发现了EIT波的反射 否认了EIT波的反射 Attril et al. (2010):

  22. STEREO时代 Cohen et al. (2009)

  23. STEREO时代 Yang & Chen (2010, Solar Phys.) EIT波速与当地磁场反相关： 不支持快波模型，能被我们的磁拉伸模型解释

  24. Hinode时代 Chen, Ding, Chen (2010, ApJ, in press) 外流出现在暗区内； 谱线增宽出现在暗区边缘

  25. SDO新时代 SDO movie

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