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Conditions for Transition from Quiescent to Active States in Stellar Atmospheres

  • Wolfgang Zwingmann
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 143)

Abstract

It is widely believed that activity in solar and stellar atmospheres is correlated to the presence of magnetic fields. Flares may be understood as large scale instabilities of magnetic field structures due to changes in photospheric boundary conditions, releasing previously stored energy. This picture has motivated us to place the emphasis on the preflare state rather than on the details of the later development. Bifurcation theory, stability analysis and numerical simulation are appropriate tools to investigate the preflare state. Care must be taken regarding the choice of boundary conditions because they may sensitively influence the results. Several approaches using these tools are discussed including a discussion of an analogous process in magnetospheric substorms. It is shown that the deviation from the force-free case seems to be relevant for the onset and the release of the stored energy. A variety of particular physical effects such as the formation of thin current sheets arise if magnetic reconnection occurrs.

Keywords

Current Sheet Solar Phys Stellar Atmosphere Equilibrium Sequence Thin Current Sheet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Aly, J.J.: 1984, Astrophys. J. 283, 349ADSCrossRefGoogle Scholar
  2. Aly, J.J., and Amari, T.: 1987, preprintGoogle Scholar
  3. An, C.-H.: 1983, Astrophys. J. 264, 302MathSciNetADSCrossRefGoogle Scholar
  4. Antiochos, S.K.: 1987, Astrophys. J. 312, 886ADSCrossRefGoogle Scholar
  5. Arendt, U.: 1985, Diplom-Thesis, Ruhr-Universität, BochumGoogle Scholar
  6. Barnes, C.W. and Sturrock, P.: 1972, Astrophys. J. 174, 659ADSCrossRefGoogle Scholar
  7. Berger, M.A.: 1984, Astrophys. Suppl. Ser. 59, 422Google Scholar
  8. Birn, J.: 1979, J.Geophys. Res. 84, 5143ADSCrossRefGoogle Scholar
  9. Birn, J., Goldstein, H., and Schindler, K.: 1978, Solar Phys. 57, 81ADSCrossRefGoogle Scholar
  10. Birn, J. and Schindler, K.: 1981, in: E.R. Priest (ed.), Solar Flare Magnetohydrodynamics, Gordon and Breach, London, p. 337Google Scholar
  11. Browning, P.K., and Priest, E.R.: 1986, Astr. Astrophys. 159, 129ADSGoogle Scholar
  12. Cargill, P.J., Hood, A.W., and Migliulo, S.: 1985, Astrophys. J. 309, 402ADSCrossRefGoogle Scholar
  13. Craig, I.J.D.: 1981, in: E.R. Priest (ed.), Solar Flare Magneto- hydrodynamics, Gordon and Breach, London, p. 227Google Scholar
  14. De Jager, C.: 1986, Space Sci. Rev. 44, 43ADSCrossRefGoogle Scholar
  15. Edenstrasser, J.W.: 1980, J. Plasma Phys. 24, 515ADSCrossRefGoogle Scholar
  16. Einaudi, G., and van Hoven, G.: 1983, Solar Phys. 88, 163ADSCrossRefGoogle Scholar
  17. Forbes, T.G.: 1986, Astrophys. J. 305, 553ADSCrossRefGoogle Scholar
  18. Forbes, T.G, and Priest, E.R.: 1984, Solar Phys. 94, 315ADSCrossRefGoogle Scholar
  19. Friedberg, J.P.: 1982, Rev. Mod. Phys. 54, 801ADSCrossRefGoogle Scholar
  20. Foukal, P.: 1975, Solar Phys. 43, 327ADSCrossRefGoogle Scholar
  21. Galeev, A.A., and Sagdeev, R.Z: 1984, in A.A. Galeev and R.N. Sudan (ed.), Basic Plasma Physics, Vol. II, North-Holland Publ. Co., p. 271Google Scholar
  22. Gary, G.A., Moore, R.L., Hagyard, M.J.:1987, Astrophys.J. 314, 782ADSCrossRefGoogle Scholar
  23. Goldstein, H., and Schindler, K.; 1982, Phys. Rev. Lett. 48, 1466ADSCrossRefGoogle Scholar
  24. Grad, H., Hu, P.N., and Stevens, D.C.: 1975, Proc. Nat. Acad. Sci. USA 72, 3798ADSCrossRefGoogle Scholar
  25. Hagyard, M., Cumings, N.P., West, E.A., and Smith, J.E.: 1982, Solar Phys. 80,33ADSCrossRefGoogle Scholar
  26. Hagyard, M.J., Smith, J.B., Teuber, D., and West, E.A: 1984, Solar Phys. 91, 115ADSCrossRefGoogle Scholar
  27. Heyvaerts, J., Lasry, J.M, Schatzman, M., and Witomsky, G.: 1982, Astron. Astrophys. 111, 104MathSciNetADSzbMATHGoogle Scholar
  28. Hones, E.W., Jr.:1984, Magnetic Reconnection, Am. Geophys. Union, Washington,D.C.Google Scholar
  29. Hood, A.: 1983, Solar Phys. 87, 279ADSCrossRefGoogle Scholar
  30. Van Hoven, G., Anzer, U., Barbosa, D.D., Birn, J., Cheng, C.-C., Hansen, R.T., Jackson, B.V., Martin, S.F., McIntosh, P.S., Nakagawa, Y., Priest, E.R., Reeves, E.M., Reichmann, E.J., Schmahl, E.J., Smith, J.B., Solodyna, C.V., Thomas, R.J., Uchida, Y., and Walker, A.B.C.: 1980, in: P.A. Sturrock (Ed.), Solar Flares, Colorado Ass. University Press, BoulderGoogle Scholar
  31. Hu, W.R., Hu, Y.Q., and Low, B.C.: 1983, Solar Phys. 83, 195ADSCrossRefGoogle Scholar
  32. Jockers, K.: 1978, Solar Phys. 56, 37ADSCrossRefGoogle Scholar
  33. Kießling, M., Brinkmann, R.P., and Schindler, K.: 1986, Phys. Rev. Lett. 56, 143ADSCrossRefGoogle Scholar
  34. Krall, K.R., Smith, J.B., Jr., Hagyard, M.J., West, E.A., and Cummings, N.P.: 1982, Solar Phys. 79, 59ADSCrossRefGoogle Scholar
  35. Kopp, R.A., Pneuman, G.W.: 1976, Solar Phys. 47, 293ADSCrossRefGoogle Scholar
  36. Linsky, J.L.: 1985, Solar Physics 100, 333ADSCrossRefGoogle Scholar
  37. Low, B.C.: 1977, Astrophys. J. 212, 234ADSCrossRefGoogle Scholar
  38. Low, B.C.: 1982a, Astrophys. J. 254, 796MathSciNetADSCrossRefGoogle Scholar
  39. Low, B.C.: 1982b, Astrophys. J. 263, 952MathSciNetADSCrossRefGoogle Scholar
  40. Low, B.C.: 1982c, Rev. Geophys. Space Sci. 20, 145ADSCrossRefGoogle Scholar
  41. Low, B.C.: 1985, Solar Phys. 100, 309ADSCrossRefGoogle Scholar
  42. Low, B.C, and Nakagawa, Y.: 1975, Astrophys. J. 199, 237ADSCrossRefGoogle Scholar
  43. Martens, P.C.H. 1987, Solar Phys. 107, 95ADSCrossRefGoogle Scholar
  44. Mikic, Z., Barnes, D.C., Schnack, D.D.: 1987, submitted to Astrophys. J.Google Scholar
  45. Mouradian, Z., Martres, M.J., and Soru-Escaut, I.: 1983, Solar Phys. 87, 309ADSCrossRefGoogle Scholar
  46. Pallavicini, R.: 1987, this volumeGoogle Scholar
  47. Parker, E.N.: 1972, Astrophys. J. 174, 499ADSCrossRefGoogle Scholar
  48. Parker, E.N.: 1979, Cosmical Magnetic Fields, Oxford University Press, EnglandGoogle Scholar
  49. Pizzo, V.: 1985, Astrophys.J. 302, 785ADSCrossRefGoogle Scholar
  50. Priest, E.P.: 1976, Solar Phys. 47, 41ADSCrossRefGoogle Scholar
  51. Priest, E.R. (ed.): 1981, Solar Flare Magnetohydrodynamics, Gordon and Breach, LondonGoogle Scholar
  52. Priest, E.P.: 1982, Solar Magnetohydrodynamics, D. Reidel, Dordrecht/HollandGoogle Scholar
  53. Priest, E.P.: 1986, Solar Phys. 104, 1ADSCrossRefGoogle Scholar
  54. Priest, E.P., and Forbes, T.G: 1986, J. Geophys. Res. 91, 5579ADSCrossRefGoogle Scholar
  55. Robinson, R.D.: 1980, Astrophys. J. 239, 261ADSCrossRefGoogle Scholar
  56. Rosner, R., Tucker, W.H., and Vaiana, G.S.: 1978, Astrophys. J 220, 643ADSCrossRefGoogle Scholar
  57. Sakurai, T.: 1979, Publ. Astron. Soc. Japan 31, 209ADSGoogle Scholar
  58. Sakurai, T., and Levine.: 1981, Astropys. J. 248, 817MathSciNetADSCrossRefGoogle Scholar
  59. Schindler.: 1974, J. Geophys. Res., 79, 2803ADSCrossRefGoogle Scholar
  60. Schindler, K., Birn, J., and Janicke, L.: 1983, Solar Phys. 87, 103ADSCrossRefGoogle Scholar
  61. Schindler, K., and Birn, J.: 1986, Space Sci. Rev 44, 307ADSCrossRefGoogle Scholar
  62. Spicer, D.S.: 1982, Space Sci. Rev. 31, 351ADSCrossRefGoogle Scholar
  63. Spicer, D.S., and Brown, J.C.: 1980, Solar Phys. 67, 385ADSCrossRefGoogle Scholar
  64. Steinolfson, P.A, and Tajima, T.: 1987, submitted to Astrophys. J. Google Scholar
  65. Steinolfson, R., and Van Hoven, G.: 1983, Astrophys. J. 276, 391ADSCrossRefGoogle Scholar
  66. Stern, D.P.: 1976, Rev. Geophys. Space Sci. 14, 199ADSCrossRefGoogle Scholar
  67. Sturrock P.A. (ed.): 1980, Solar Flares, Colorado Ass. University Press, BoulderGoogle Scholar
  68. Sturrock, P.A., and Woodbury, E.T.: 1967, in P.A. Sturrock, Plasma Astrophysics, Academic Press, New YorkGoogle Scholar
  69. Sturrock, P.A., Kaufman, P., Moore, R.L., and Smith, D.F.:1984, Solar Phys. 94, 341ADSCrossRefGoogle Scholar
  70. Sun, W.-H., Giampapa, M.S., Worden, S.P.: 1987, Astrophys. J. 312, 930ADSCrossRefGoogle Scholar
  71. Svestka, Z.: 1976, Solar Flares, D. Reidel Publ. Co., Dordrecht, HollandGoogle Scholar
  72. Svestka, Z.: 1981, in: E.R. Priest (ed.), Solar Flare Magnetohydrodynamics, Gordon and Breach, New York, p. 47Google Scholar
  73. Syrovatskii, S.I.: 1971, Sov. Phys. JETP 33, 933ADSGoogle Scholar
  74. Syrovatskii, S.I.: 1978, Solar Phys. 76, 3ADSCrossRefGoogle Scholar
  75. Tsinganos, K.C.: 1982a, Astrophys. J. 252, 775MathSciNetADSCrossRefGoogle Scholar
  76. Tsinganos, K.C.: 1982b, Astrophys. J. 259, 832MathSciNetADSCrossRefGoogle Scholar
  77. Tsinganos, K.C., Distler, J., and Rosner, R.: 1984, Astrophys. J. 278, 409MathSciNetADSCrossRefGoogle Scholar
  78. Van Hoven, G.: 1981, in: E.R. Priest (ed.), Solar Flare Magnetohydrodynamics, Gordon and Breach, New York, p. 47Google Scholar
  79. Wu, S.T., Dryer, M., Nakagawa, Y., and Tandberg-Hansen, E.: 1978, Astrophys. J. 219, 324MathSciNetADSCrossRefGoogle Scholar
  80. Wu, S.T., Hu, Y.Q., Nakagawa, Y., and Tandberg-Hansen, E.: 1983, Astrophys. J. 266, 866ADSCrossRefGoogle Scholar
  81. Yang, W.H., Sturrock, P.A., and Antiochos, S.K.: 1986, Astrophys. J. 309, 383ADSCrossRefGoogle Scholar
  82. Zirin, H. and Tanaka, K.: 1973, Solar Phys. 32, 173ADSCrossRefGoogle Scholar
  83. Zweibel, E., and Li, H.S.: Astrophys. J. 312, 423Google Scholar
  84. Zwingmann, W.: 1981, Proc. Int. School and Workshop on Plasma Astrophysics, Varenna, Italy, p. 397Google Scholar
  85. Zwingmann, W., Schindler, K., and Birn, J.: 1985, Solar Phys. 99, 133ADSCrossRefGoogle Scholar
  86. Zwingmann, W.: 1987, Solar Phys., in pressGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Wolfgang Zwingmann
    • 1
  1. 1.Institut für Theoretische Physik IVRuhr-Universität BochumBochum 1Germany

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