Space Science Reviews

, 159:263 | Cite as

Microflares and the Statistics of X-ray Flares

  • I. G. Hannah
  • H. S. Hudson
  • M. Battaglia
  • S. Christe
  • J. Kašparová
  • S. Krucker
  • M. R. Kundu
  • A. Veronig
Article

Abstract

This review surveys the statistics of solar X-ray flares, emphasising the new views that RHESSI has given us of the weaker events (the microflares). The new data reveal that these microflares strongly resemble more energetic events in most respects; they occur solely within active regions and exhibit high-temperature/nonthermal emissions in approximately the same proportion as major events. We discuss the distributions of flare parameters (e.g., peak flux) and how these parameters correlate, for instance via the Neupert effect. We also highlight the systematic biases involved in intercomparing data representing many decades of event magnitude. The intermittency of the flare/microflare occurrence, both in space and in time, argues that these discrete events do not explain general coronal heating, either in active regions or in the quiet Sun.

Keywords

Sun Flares X-rays 

References

  1. W.P. Abbett, S.L. Hawley, Astrophys. J. 521, 906 (1999). doi:10.1086/307576 ADSGoogle Scholar
  2. I.A. Ahmad, D.F. Webb, Sol. Phys. 58, 323 (1978). doi:10.1007/BF00157278 ADSGoogle Scholar
  3. K. Akabane, Publ. Astron. Soc. Jpn. 8, 173 (1956). ADSGoogle Scholar
  4. D. Alexander, A.G. Daou, Astrophys. J. 666, 1268 (2007). doi:10.1086/520331 ADSGoogle Scholar
  5. K.A. Anderson, S.R. Kane, J.H. Primbsch, R.H. Weitzmann, W.D. Evans, R.W. Klebesadel, W.P. Aiello, IEEE Trans. Geosci. Electron. 16, 157 (1978) ADSGoogle Scholar
  6. M.J. Aschwanden, Advances in Space Research 39, 1867 (2007). doi:10.1016/j.asr.2007.03.050 ADSGoogle Scholar
  7. M.J. Aschwanden, P. Charbonneau, Astrophys. J. Lett. 566, L59 (2002). doi:10.1086/339451 ADSGoogle Scholar
  8. M.J. Aschwanden, C.E. Parnell, Astrophys. J. 572, 1048 (2002). doi:10.1086/340385 ADSGoogle Scholar
  9. M.J. Aschwanden, B.R. Dennis, A.O. Benz, Astrophys. J. 497, 972 (1998). doi:10.1086/305484 ADSGoogle Scholar
  10. M.J. Aschwanden, T.D. Tarbell, R.W. Nightingale, C.J. Schrijver, A. Title, C.C. Kankelborg, P. Martens, H.P. Warren, Astrophys. J. 535, 1047 (2000) ADSGoogle Scholar
  11. M.J. Aschwanden, R.A. Stern, M. Güdel, Astrophys. J. 672, 659 (2008). arXiv:0710.2563, doi:10.1086/523926 ADSGoogle Scholar
  12. H. Aurass, K.-L. Klein, P.C.H. Martens, Sol. Phys. 155, 203 (1994). doi:10.1007/BF00670741 ADSGoogle Scholar
  13. T. Bai, Astrophys. J. 404, 805 (1993). doi:10.1086/172335 ADSGoogle Scholar
  14. P. Bak, C. Tang, K. Wiesenfeld, Phys. Rev. Lett. 59, 381 (1987). doi:10.1103/PhysRevLett.59.381 MathSciNetADSGoogle Scholar
  15. M. Battaglia, P.C. Grigis, A.O. Benz, Astron. Astrophys. 439, 737 (2005). arXiv:astro-ph/0505154, doi:10.1051/0004-6361:20053027 ADSGoogle Scholar
  16. A.O. Benz, S. Krucker, Astrophys. J. 568, 413 (2002) ADSGoogle Scholar
  17. D.A. Biesecker, Ph.D. thesis, University of New Hampshire, 1994 Google Scholar
  18. P.L. Bornmann, Astrophys. J. 356, 733 (1990). doi:10.1086/168880 ADSGoogle Scholar
  19. K.R. Bromund, J.M. McTiernan, S.R. Kane, Astrophys. J. 455, 733 (1995). doi:10.1086/176619 ADSGoogle Scholar
  20. J.W. Brosius, K.J.H. Phillips, Astrophys. J. 613, 580 (2004). doi:10.1086/422873 ADSGoogle Scholar
  21. J.C. Brown, Sol. Phys. 18, 489 (1971) ADSGoogle Scholar
  22. P.J. Cargill, J.A. Klimchuk, Astrophys. J. 478, 799 (1997). doi:10.1086/303816 ADSGoogle Scholar
  23. P.J. Cargill, J.A. Klimchuk, Astrophys. J. 605, 911 (2004). doi:10.1086/382526 ADSGoogle Scholar
  24. R.C. Carrington, Mon. Not. R. Astron. Soc. 20, 13 (1859) ADSGoogle Scholar
  25. A. Caspi, R.P. Lin, Astrophys. J. Lett. 725, L161–L166 (2010). doi:10.1088/2041-8205/725/2/L161. arXiv:1105.2839 ADSGoogle Scholar
  26. P. Charbonneau, S.W. McIntosh, H.-L. Liu, T.J. Bogdan, Sol. Phys. 203, 321 (2001). doi:10.1023/A:1013301521745 ADSGoogle Scholar
  27. C. Chifor, H. Isobe, H.E. Mason, I.G. Hannah, P.R. Young, G. Del Zanna, S. Krucker, K. Ichimoto, Y. Katsukawa, T. Yokoyama, Astron. Astrophys. 491, 279 (2008). doi:10.1051/0004-6361:200810265 ADSGoogle Scholar
  28. S. Christe, I.G. Hannah, S. Krucker, J. McTiernan, R.P. Lin, Astrophys. J. 677, 1385 (2008a). doi:10.1086/529011 ADSGoogle Scholar
  29. S. Christe, S. Krucker, R.P. Lin, Astrophys. J. Lett. 680, L149 (2008b). doi:10.1086/589971 ADSGoogle Scholar
  30. J.W. Cirtain, L. Golub, L. Lundquist, A. van Ballegooijen, A. Savcheva, M. Shimojo, E. DeLuca, S. Tsuneta, T. Sakao, K. Reeves, M. Weber, R. Kano, N. Narukage, K. Shibasaki, Science 318, 1580 (2007). doi:10.1126/science.1147050 ADSGoogle Scholar
  31. E.W. Cliver, L. Svalgaard, Sol. Phys. 224, 407 (2004). doi:10.1007/s11207-005-4980-z ADSGoogle Scholar
  32. D.F. Crawford, D.L. Jauncey, H.S. Murdoch, Astrophys. J. 162, 405 (1970). doi:10.1086/150672 MathSciNetADSGoogle Scholar
  33. N. Crosby, N. Vilmer, N. Lund, R. Sunyaev, Astron. Astrophys. 334, 299 (1998) ADSGoogle Scholar
  34. N.B. Crosby, M.J. Aschwanden, B.R. Dennis, Sol. Phys. 143, 275 (1993) ADSGoogle Scholar
  35. D.W. Datlowe, M.J. Elcan, H.S. Hudson, Sol. Phys. 39, 155 (1974) ADSGoogle Scholar
  36. B.R. Dennis, Sol. Phys. 100, 465 (1985) ADSGoogle Scholar
  37. B.R. Dennis, D.M. Zarro, Sol. Phys. 146, 177 (1993) ADSGoogle Scholar
  38. J.F. Drake, Sol. Phys. 16, 152 (1971a). doi:10.1007/BF00154510 ADSGoogle Scholar
  39. J.F. Drake, Sol. Phys. 16, 152 (1971b) ADSGoogle Scholar
  40. J.P. Eastwood, M.S. Wheatland, H.S. Hudson, S. Krucker, S.D. Bale, M. Maksimovic, K. Goetz, J. Bougeret, Astrophys. J. Lett. 708, L95 (2010). arXiv:0911.4131, doi:10.1088/2041-8205/708/2/L95 ADSGoogle Scholar
  41. A.G. Emslie, B.R. Dennis, G.D. Holman, H.S. Hudson, J. Geophys. Res. 110(A9), 11103 (2005). doi:10.1029/2005JA011305 Google Scholar
  42. U. Feldman, G.A. Doschek, W.E. Behring, K.J.H. Phillips, Astrophys. J. 460, 1034 (1996). doi:10.1086/177030 ADSGoogle Scholar
  43. U. Feldman, G.A. Doschek, J.A. Klimchuk, Astrophys. J. 474, 511 (1997). doi:10.1086/303428 ADSGoogle Scholar
  44. G.H. Fisher, R.C. Canfield, A.N. McClymont, Astrophys. J. 289, 434 (1985). doi:10.1086/162903 ADSGoogle Scholar
  45. L. Fletcher, I.G. Hannah, H.S. Hudson, T.R. Metcalf, Astrophys. J. 656, 1187 (2007). doi:10.1086/510446 ADSGoogle Scholar
  46. L. Fletcher, B.R. Dennis, H.S. Hudson, S. Krucker, K. Phillips, A. Veronig, M. Battaglia, L. Bone, Q. Chen, P. Gallagher, P. Grigis, H. Ji, H. Liu, R.O. Milligan, M. Temmer, Space Sci. Rev. (2011) Google Scholar
  47. L. Fritzova-Svestkova, R.C. Chase, Z. Svestka, Sol. Phys. 48, 275 (1976). doi:10.1007/BF00151996 ADSGoogle Scholar
  48. E. Fuerst, A.O. Benz, W. Hirth, Astron. Astrophys. 107, 178 (1982) ADSGoogle Scholar
  49. D.E. Gary, M.D. Hartl, T. Shimizu, Astrophys. J. 477, 958 (1997). doi:10.1086/303748 ADSGoogle Scholar
  50. L. Golub, A.S. Krieger, J.K. Silk, A.F. Timothy, G.S. Vaiana, Astrophys. J. Lett. 189, L93 (1974) ADSGoogle Scholar
  51. N. Gopalswamy, T.E.W. Payne, E.J. Schmahl, M.R. Kundu, J.R. Lemen, K.T. Strong, R.C. Canfield, J. de La Beaujardiere, Astrophys. J. 437, 522 (1994). doi:10.1086/175015 ADSGoogle Scholar
  52. J.A. Grayson, S. Krucker, R.P. Lin, Astrophys. J. 707, 1588 (2009). doi:10.1088/0004-637X/707/2/1588 ADSGoogle Scholar
  53. B. Gutenberg, C.F. Richter, Seismicity of the Earth and Associated Phenomena, 2nd edn. (Princeton University Press, Princeton, 1956) Google Scholar
  54. I.G. Hannah, G.J. Hurford, H.S. Hudson, R.P. Lin, Rev. Sci. Instrum. 78, 4501 (2007a). doi:10.1063/1.2437120 Google Scholar
  55. I.G. Hannah, G.J. Hurford, H.S. Hudson, R.P. Lin, K. van Bibber, Astrophys. J. Lett. 659, L77 (2007b). arXiv:astro-ph/0702726, doi:10.1086/516750 ADSGoogle Scholar
  56. I.G. Hannah, S. Christe, S. Krucker, G.J. Hurford, H.S. Hudson, R.P. Lin, Astrophys. J. 677, 704 (2008a). arXiv:0712.2544, doi:10.1086/529012 ADSGoogle Scholar
  57. I.G. Hannah, S. Krucker, H.S. Hudson, S. Christe, R.P. Lin, Astron. Astrophys. 481, L45 (2008b). arXiv:0712.0369, doi:10.1051/0004-6361:20079019 ADSGoogle Scholar
  58. I.G. Hannah, H.S. Hudson, G.J. Hurford, R.P. Lin, Astrophys. J. (2010) Google Scholar
  59. H. Hara, K. Nakakubo-Morimoto, Astrophys. J. 589, 1062 (2003). doi:10.1086/374778 ADSGoogle Scholar
  60. M.A. Hendry, J.F.L. Simmons, Astron. Astrophys. 237, 275 (1990) ADSGoogle Scholar
  61. R. Hodgson, Mon. Not. R. Astron. Soc. 20, 15 (1859) ADSGoogle Scholar
  62. G.D. Holman, L. Sui, R.A. Schwartz, A.G. Emslie, Astrophys. J. Lett. 595, L97 (2003). doi:10.1086/378488 ADSGoogle Scholar
  63. G.D. Holman, M.J. Aschwanden, H. Aurass, M. Battaglia, P.C. Grigis, E.P. Kontar, W. Liu, P. Saint-Hilaire, V.V. Zharkov, Space Sci. Rev. (2010) Google Scholar
  64. H.S. Hudson, in Bulletin of the American Astronomical Society, vol. 23 (1991a), p. 1064 Google Scholar
  65. H.S. Hudson, Sol. Phys. 133, 357 (1991b) ADSGoogle Scholar
  66. H.S. Hudson, Astrophys. J. Lett. 663, L45 (2007) arXiv:0707.1118, doi:10.1086/519923 ADSGoogle Scholar
  67. H.S. Hudson, L.E. Peterson, D.A. Schwartz, Astrophys. J. 157, 389 (1969) ADSGoogle Scholar
  68. S.W. Kahler, J. Geophys. Res. 87, 3439 (1982). doi:10.1029/JA087iA05p03439 ADSGoogle Scholar
  69. J.I. Katz, J. Geophys. Res. 91, 10412 (1986). doi:10.1029/JB091iB10p10412 ADSGoogle Scholar
  70. J. Kašparová, E.P. Kontar, J.C. Brown, Astron. Astrophys. 466, 705 (2007). arXiv:astro-ph/0701871, doi:10.1051/0004-6361:20066689 ADSGoogle Scholar
  71. H.R.M. Kay, J.L. Culhane, L.K. Harra, S.A. Matthews, Advances in Space Research 32, 1051 (2003). doi:10.1016/S0273-1177(03)00308-9 ADSGoogle Scholar
  72. A.L. Kiplinger, Astrophys. J. 453, 973 (1995). doi:10.1086/176457 ADSGoogle Scholar
  73. A.L. Kiplinger, H.A. Garcia, in Bulletin of the American Astronomical Society, vol. 36 (2004), p. 739 Google Scholar
  74. E. Kontar, J. Brown, A. Emslie, W. Hajdas, G. Holman, G. Hurford, J. Kasparova, P. Mallik, A. Massone, M. McConnell, M. Piana, M. Prato, E. Schmahl, E. Suarez-Garcia, Space Sci. Rev. (2010) Google Scholar
  75. E.P. Kontar, E. Dickson, J. Kašparová, Sol. Phys. 252, 139 (2008). arXiv:0805.1470, doi:10.1007/s11207-008-9249-x ADSGoogle Scholar
  76. G. Kopp, G. Lawrence, G. Rottman, Sol. Phys. 230, 129 (2005). doi:10.1007/s11207-005-7433-9 ADSGoogle Scholar
  77. T. Kosugi, B.R. Dennis, K. Kai, Astrophys. J. 324, 1118 (1988). doi:10.1086/165967 ADSGoogle Scholar
  78. J. Kotoku, R. Kano, S. Tsuneta, Y. Katsukawa, T. Shimizu, T. Sakao, K. Shibasaki, E.E. Deluca, K.E. Korreck, L. Golub, A. Bobra, Publ. Astron. Soc. Jpn. 59, 735 (2007) ADSGoogle Scholar
  79. S. Krucker, A.O. Benz, Astrophys. J. Lett. 501, L213 (1998). doi:10.1086/311474 ADSGoogle Scholar
  80. S. Krucker, R.P. Lin, Astrophys. J. 673, 1181 (2008). doi:10.1086/524010 ADSGoogle Scholar
  81. S. Krucker, A.O. Benz, T.S. Bastian, L.W. Acton, Astrophys. J. 488, 499 (1997). doi:10.1086/304686 ADSGoogle Scholar
  82. S. Krucker, S. Christe, R.P. Lin, G.J. Hurford, R.A. Schwartz, Sol. Phys. 210, 445 (2002). doi:10.1023/A:1022404512780 ADSGoogle Scholar
  83. T.A. Kucera, B.R. Dennis, R.A. Schwartz, D. Shaw, Astrophys. J. 475, 338 (1997). doi:10.1086/303532 ADSGoogle Scholar
  84. M.R. Kundu, J.P. Raulin, N. Nitta, H.S. Hudson, M. Shimojo, K. Shibata, A. Raoult, Astrophys. J. Lett. 447, L135 (1995). doi:10.1086/309567 ADSGoogle Scholar
  85. M.R. Kundu, G. Trottet, V.I. Garaimov, P.C. Grigis, E.J. Schmahl, Advances in Space Research 35, 1778 (2005). doi:10.1016/j.asr.2005.04.052 ADSGoogle Scholar
  86. M.R. Kundu, E.J. Schmahl, P.C. Grigis, V.I. Garaimov, K. Shibasaki, Astron. Astrophys. 451, 691 (2006). doi:10.1051/0004-6361:20053987 ADSGoogle Scholar
  87. E. Landi, K.J.H. Phillips, Astrophys. J. Suppl. Ser. 166, 421 (2006). doi:10.1086/506180 ADSGoogle Scholar
  88. T.T. Lee, V. Petrosian, J.M. McTiernan, Astrophys. J. 412, 401 (1993). doi:10.1086/172929 ADSGoogle Scholar
  89. T.T. Lee, V. Petrosian, J.M. McTiernan, Astrophys. J. 448, 915 (1995). doi:10.1086/176020 ADSGoogle Scholar
  90. F. Lepreti, V. Carbone, P. Veltri, Astrophys. J. Lett. 555, L133 (2001). doi:10.1086/323178 ADSGoogle Scholar
  91. W.H.G. Lewin, J. Doty, G.W. Clark, S.A. Rappaport, H.V.D. Bradt, R. Doxsey, D.R. Hearn, J.A. Hoffman, J.G. Jernigan, F.K. Li, W. Mayer, J. McClintock, F. Primini, J. Richardson, Astrophys. J. Lett. 207, L95 (1976). doi:10.1086/182188 ADSGoogle Scholar
  92. R.P. Lin, Space Sci. Rev. 16, 189 (1974). doi:10.1007/BF00240886 ADSGoogle Scholar
  93. R.P. Lin, H.S. Hudson, Sol. Phys. 50, 153 (1976). doi:10.1007/BF00206199 ADSGoogle Scholar
  94. R.P. Lin, R.A. Schwartz, S.R. Kane, R.M. Pelling, K.C. Hurley, Astrophys. J. 283, 421 (1984). doi:10.1086/162321 ADSGoogle Scholar
  95. R.P. Lin, P.T. Feffer, R.A. Schwartz, Astrophys. J. Lett. 557, L125 (2001a) ADSGoogle Scholar
  96. R.P. Lin, P.T. Feffer, R.A. Schwartz, Astrophys. J. Lett. 557, L125 (2001b). doi:10.1086/323270 ADSGoogle Scholar
  97. R.P. Lin, B.R. Dennis, G.J. Hurford, D.M. Smith, A. Zehnder, P.R. Harvey, D.W. Curtis, D. Pankow, P. Turin, M. Bester, A. Csillaghy, M. Lewis, N. Madden, H.F. van Beek, M. Appleby, T. Raudorf, J. McTiernan, R. Ramaty, E. Schmahl, R. Schwartz, S. Krucker, R. Abiad, T. Quinn, P. Berg, M. Hashii, R. Sterling, R. Jackson, R. Pratt, R.D. Campbell, D. Malone, D. Landis, C.P. Barrington-Leigh, S. Slassi-Sennou, C. Cork, D. Clark, D. Amato, L. Orwig, R. Boyle, I.S. Banks, K. Shirey, A.K. Tolbert, D. Zarro, F. Snow, K. Thomsen, R. Henneck, A. McHedlishvili, P. Ming, M. Fivian, J. Jordan, R. Wanner, J. Crubb, J. Preble, M. Matranga, A. Benz, H. Hudson, R.C. Canfield, G.D. Holman, C. Crannell, T. Kosugi, A.G. Emslie, N. Vilmer, J.C. Brown, C. Johns-Krull, M. Aschwanden, T. Metcalf, A. Conway, Sol. Phys. 210, 3 (2002). doi:10.1023/A:1022428818870 ADSGoogle Scholar
  98. R.E. Lingenfelter, H.S. Hudson, in The Ancient Sun: Fossil Record in the Earth, Moon and Meteorites, ed. by R.O. Repin, J.A. Eddy, R.B. Merrill (1980), pp. 69–79 Google Scholar
  99. Y.E. Litvinenko, Sol. Phys. 151, 195 (1994). doi:10.1007/BF00654092 ADSGoogle Scholar
  100. C. Liu, J. Qiu, D.E. Gary, S. Krucker, H. Wang, Astrophys. J. 604, 442 (2004). doi:10.1086/381799 ADSGoogle Scholar
  101. E.T. Lu, R.J. Hamilton, Astrophys. J. Lett. 380, L89 (1991). doi:10.1086/186180 ADSGoogle Scholar
  102. E.T. Lu, R.J. Hamilton, J.M. McTiernan, K.R. Bromund, Astrophys. J. 412, 841 (1993). doi:10.1086/172966 ADSGoogle Scholar
  103. K.G. McCracken, D.F. Smart, M.A. Shea, G.A.M. Dreschhoff, in International Cosmic Ray Conference, vol. 8 (2001), p. 3209 Google Scholar
  104. J.M. McTiernan, Astrophys. J. 697, 94 (2009). doi:10.1088/0004-637X/697/1/94 ADSGoogle Scholar
  105. J.M. McTiernan, G.H. Fisher, P. Li, Astrophys. J. 514, 472 (1999). doi:10.1086/306924 ADSGoogle Scholar
  106. R.O. Milligan, Private communication, 2009 Google Scholar
  107. Y.-J. Moon, G.S. Choe, H.S. Yun, Y.D. Park, J. Geophys. Res. 106, 29951 (2001). doi:10.1029/2000JA000224 ADSGoogle Scholar
  108. Y.-J. Moon, G.S. Choe, Y.D. Park, H. Wang, P.T. Gallagher, J. Chae, H.S. Yun, P.R. Goode, Astrophys. J. 574, 434 (2002). doi:10.1086/340945 ADSGoogle Scholar
  109. D. Moses, J.W. Cook, J.-D.F. Bartoe, G.E. Brueckner, K.P. Dere, D.F. Webb, J.M. Davis, J.W. Harvey, F. Recely, S.F. Martin, H. Zirin, Astrophys. J. 430, 913 (1994). doi:10.1086/174461 ADSGoogle Scholar
  110. W.M. Neupert, Astrophys. J. Lett. 153, L59 (1968) ADSGoogle Scholar
  111. H.W. Newton, Mon. Not. R. Astron. Soc. 103, 244 (1943) ADSGoogle Scholar
  112. A. Nindos, M.R. Kundu, S.M. White, Astrophys. J. 513, 983 (1999). doi:10.1086/306886 ADSGoogle Scholar
  113. N. Nitta, Astrophys. J. 491, 402 (1997). doi:10.1086/304938 ADSGoogle Scholar
  114. N. Nitta, T. Kosugi, Sol. Phys. 105, 73 (1986). doi:10.1007/BF00156378 ADSGoogle Scholar
  115. N. Nitta, T.S. Bastian, M.J. Aschwanden, K.L. Harvey, K.T. Strong, Publ. Astron. Soc. Jpn. 44, L167 (1992) ADSGoogle Scholar
  116. R.A. Osten, S. Drake, J. Tueller, J. Cummings, M. Perri, A. Moretti, S. Covino, Astrophys. J. 654, 1052 (2007). arXiv:astro-ph/0609205, doi:10.1086/509252 ADSGoogle Scholar
  117. E.N. Parker, Astrophys. J. 330, 474 (1988). doi:10.1086/166485 ADSGoogle Scholar
  118. C.E. Parnell, Mon. Not. R. Astron. Soc. 335, 389 (2002). doi:10.1046/j.1365-8711.2002.05618.x ADSGoogle Scholar
  119. C.E. Parnell, P.E. Jupp, Astrophys. J. 529, 554 (2000). doi:10.1086/308271 ADSGoogle Scholar
  120. K.J.H. Phillips, Astrophys. J. 605, 921 (2004). doi:10.1086/382523 ADSGoogle Scholar
  121. M. Pick, N. Vilmer, Astron. Astrophys. Rev. 6 (2008). doi:10.1007/s00159-008-0013-x
  122. J.G. Porter, R.L. Moore, E.J. Reichmann, O. Engvold, K.L. Harvey, Astrophys. J. 323, 380 (1987). doi:10.1086/165835 ADSGoogle Scholar
  123. W.H. Press, S.A. Teukolsky, W.T. Vetterling, B.P. Flannery, Numerical Recipes in C. The Art of Scientific Computing, 2nd edn. (Cambridge University Press, Cambridge, 1992) MATHGoogle Scholar
  124. J. Qiu, C. Liu, D.E. Gary, G.M. Nita, H. Wang, Astrophys. J. 612, 530 (2004). doi:10.1086/422401 ADSGoogle Scholar
  125. J.-P. Raulin, S.M. White, M.R. Kundu, A.V.R. Silva, K. Shibasaki, Astrophys. J. 522, 547 (1999). doi:10.1086/322974 ADSGoogle Scholar
  126. D.V. Reames, Space Sci. Rev. 90, 413 (1999). doi:10.1023/A:1005105831781 ADSGoogle Scholar
  127. R.S. Richardson, Publ. Astron. Soc. Pac. 56, 156 (1944) ADSGoogle Scholar
  128. R. Rosner, G.S. Vaiana, Astrophys. J. 222, 1104 (1978). doi:10.1086/156227 ADSGoogle Scholar
  129. P. Saint-Hilaire, A.O. Benz, Astron. Astrophys. 435, 743 (2005). doi:10.1051/0004-6361:20041918 ADSGoogle Scholar
  130. P. Saint-Hilaire, S. Krucker, R.P. Lin, Sol. Phys. 250, 53 (2008). doi:10.1007/s11207-008-9193-9 ADSGoogle Scholar
  131. R. Saldanha, S. Krucker, R.P. Lin, Astrophys. J. 673, 1169 (2008). doi:10.1086/524929 ADSGoogle Scholar
  132. N. Santangelo, H. Horstman, E. Horstman-Moretti, Sol. Phys. 29, 143 (1973). doi:10.1007/BF00153445 ADSGoogle Scholar
  133. A. Savcheva, J. Cirtain, E.E. Deluca, L.L. Lundquist, L. Golub, M. Weber, M. Shimojo, K. Shibasaki, T. Sakao, N. Narukage, S. Tsuneta, R. Kano, Publ. Astron. Soc. Jpn. 59, 771 (2007) ADSGoogle Scholar
  134. A. Schadee, C. de Jager, Z. Svestka, Sol. Phys. 89, 287 (1983). doi:10.1007/BF00217252 ADSGoogle Scholar
  135. R.A. Schwartz, B.R. Dennis, G.J. Fishman, C.A. Meegan, R.B. Wilson, W.S. Paciesas, in The Compton Observatory Science Workshop, ed. by C.R. Shrader, N. Gehrels, B. Dennis (1992), pp. 457–468 Google Scholar
  136. N.I. Shakhovskaia, Sol. Phys. 121, 375 (1989). doi:10.1007/BF00161707 ADSGoogle Scholar
  137. K. Shibata, Y. Ishido, L.W. Acton, K.T. Strong, T. Hirayama, Y. Uchida, A.H. McAllister, R. Matsumoto, S. Tsuneta, T. Shimizu, H. Hara, T. Sakurai, K. Ichimoto, Y. Nishino, Y. Ogawara, Publ. Astron. Soc. Jpn. 44, L173 (1992) ADSGoogle Scholar
  138. T. Shimizu, Publ. Astron. Soc. Jpn. 47, 251 (1995) ADSGoogle Scholar
  139. T. Shimizu, R.A. Shine, A.M. Title, T.D. Tarbell, Z. Frank, Astrophys. J. 574, 1074 (2002). doi:10.1086/340998 ADSGoogle Scholar
  140. M. Shimojo, S. Hashimoto, K. Shibata, T. Hirayama, H.S. Hudson, L.W. Acton, Publ. Astron. Soc. Jpn. 48, 123 (1996) ADSGoogle Scholar
  141. M. Shimojo, N. Narukage, R. Kano, T. Sakao, S. Tsuneta, K. Shibasaki, J.W. Cirtain, L.L. Lundquist, K. Reeves, A. Savcheva, Publ. Astron. Soc. Jpn. 59, 745 (2007) Google Scholar
  142. A.V.R. Silva, H. Wang, D.E. Gary, Astrophys. J. 545, 1116 (2000). doi:10.1086/317822 ADSGoogle Scholar
  143. H.J. Smith, E.V.P. Smith, Solar Flares (Macmillan, New York, 1963) Google Scholar
  144. S. Stoiser, A.M. Veronig, H. Aurass, A. Hanslmeier, Sol. Phys. 246, 339 (2007). doi:10.1007/s11207-007-9066-7 ADSGoogle Scholar
  145. K.T. Strong, K. Harvey, T. Hirayama, N. Nitta, T. Shimizu, S. Tsuneta, Publ. Astron. Soc. Jpn. 44, L161 (1992) ADSGoogle Scholar
  146. L. Sui, G.D. Holman, B.R. Dennis, Astrophys. J. 670, 862 (2007). doi:10.1086/522198 ADSGoogle Scholar
  147. M. Takahashi, T. Watanabe, Adv. Space Res. 25, 1833 (2000). doi:10.1016/S0273-1177(99)00628-6 ADSGoogle Scholar
  148. R.J. Thomas, R.G. Teske, Sol. Phys. 16, 431 (1971). doi:10.1007/BF00162486 ADSGoogle Scholar
  149. S. Tsuneta, J.R. Lemen, in Physics of Solar and Stellar Coronae: G.S. Vaiana Memorial Symposium, Palermo, Italy, ed. by J.L. Linsky, S. Serio (1993), p. 113 Google Scholar
  150. B.T. Tsurutani, W.D. Gonzalez, G.S. Lakhina, S. Alex, J. Geophys. Res. (Space Phys.) 108, 1268 (2003). doi:10.1029/2002JA009504 ADSGoogle Scholar
  151. A. Veronig, M. Temmer, A. Hanslmeier, W. Otruba, M. Messerotti, Astron. Astrophys. 382, 1070 (2002a). arXiv:astro-ph/0207234, doi:10.1051/0004-6361:20011694 ADSGoogle Scholar
  152. A. Veronig, B. Vršnak, B.R. Dennis, M. Temmer, A. Hanslmeier, J. Magdalenić, Astron. Astrophys. 392, 699 (2002b). arXiv:astro-ph/0207217, doi:10.1051/0004-6361:20020947 ADSGoogle Scholar
  153. A.M. Veronig, J.C. Brown, B.R. Dennis, R.A. Schwartz, L. Sui, A.K. Tolbert, Astrophys. J. 621, 482 (2005). doi:10.1086/427274 ADSGoogle Scholar
  154. N. Vilmer, A.L. MacKinnon, G.J. Hurford, Space Sci. Rev. (2010) Google Scholar
  155. B. Vršnak, D. Sudar, D. Ruždjak, Astron. Astrophys. 435, 1149 (2005). doi:10.1051/0004-6361:20042166 ADSGoogle Scholar
  156. Y. Wang, J. Zhang, Astrophys. J. 665, 1428 (2007). arXiv:0808.2976, doi:10.1086/519765 ADSGoogle Scholar
  157. M.S. Wheatland, Astrophys. J. Lett. 536, L109 (2000). arXiv:astro-ph/0005121, doi:10.1086/312739 ADSGoogle Scholar
  158. M.S. Wheatland, Sol. Phys. 203, 87 (2001) ADSGoogle Scholar
  159. M.S. Wheatland, Astrophys. J. 609, 1134 (2004). arXiv:astro-ph/0403613, doi:10.1086/421261 ADSGoogle Scholar
  160. M.S. Wheatland, Astrophys. J. 679, 1621 (2008). arXiv:0802.3931, doi:10.1086/587871 ADSGoogle Scholar
  161. M.S. Wheatland, Astrophys. J. 710, 1324 (2010). arXiv:1001.1464, doi:10.1088/0004-637X/710/2/1324 ADSGoogle Scholar
  162. M.S. Wheatland, S. Glukhov, Astrophys. J. 494, 858 (1998). doi:10.1086/305245 ADSGoogle Scholar
  163. M.S. Wheatland, Y.E. Litvinenko, Sol. Phys. 211, 255 (2002) ADSGoogle Scholar
  164. M.S. Wheatland, P.A. Sturrock, J.M. McTiernan, Astrophys. J. 509, 448 (1998). doi:10.1086/306492 ADSGoogle Scholar
  165. S.M. White, K. Arzner, S. Christe, F. Farnik, K.-L. Klein, M.R. Kundu, Z. Ning, J.-P. Raulin, A.V.R. Silva VA’alio, P. Saint-Hilaire, G. Trottet, A. Warmuth, Space Sci. Rev. (2010) Google Scholar
  166. J.P. Wild, S.F. Smerd, A.A. Weiss, Annu. Rev. Astron. Astrophys. 1, 291 (1963). doi:10.1146/annurev.aa.01.090163.001451 ADSGoogle Scholar
  167. J.A. Willick, Astrophys. J. Suppl. Ser. 92, 1 (1994). doi:10.1086/191957 ADSGoogle Scholar
  168. T.N. Woods, F.G. Eparvier, J. Fontenla, J. Harder, G. Kopp, W.E. McClintock, G. Rottman, B. Smiley, M. Snow, Geophys. Res. Lett. 3110802 (2004) Google Scholar
  169. S. Yashiro, S. Akiyama, N. Gopalswamy, R.A. Howard, Astrophys. J. Lett. 650, L143 (2006). arXiv:astro-ph/0609197, doi:10.1086/508876 ADSGoogle Scholar
  170. S. Yashiro, N. Gopalswamy, G. Michalek, O.C. St. Cyr, S.P. Plunkett, N.B. Rich, R.A. Howard, J. Geophys. Res. 109(A18), 7105 (2004). doi:10.1029/2003JA010282 Google Scholar
  171. T. Yoshida, S. Tsuneta, Astrophys. J. 459, 342 (1996). doi:10.1086/176897 ADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • I. G. Hannah
    • 1
  • H. S. Hudson
    • 2
  • M. Battaglia
    • 1
  • S. Christe
    • 3
  • J. Kašparová
    • 4
  • S. Krucker
    • 2
  • M. R. Kundu
    • 5
  • A. Veronig
    • 6
  1. 1.School of Physics & AstronomyUniversity of GlasgowGlasgowUK
  2. 2.Space Sciences LaboratoryUniversity of California at BerkeleyBerkeleyUSA
  3. 3.NASA Goddard Space Flight CenterGreenbeltUSA
  4. 4.Astronomický ústav AV ČROndřejovCzech Republic
  5. 5.Dept. of AstronomyUniv. of MarylandCollege ParkUSA
  6. 6.Institute of Physics/IGAMUniversity of GrazGrazAustria

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