Solar Physics

, Volume 157, Issue 1–2, pp 325–348 | Cite as

Dynamical evolution of a coronal streamer-bubble system

I.A self-consistent planar magnetohydrodynamic simulation
  • S. T. Wu
  • W. P. Guo
  • J. F. Wang
Article

Abstract

We present a self-consistent, time-dependent magnetohydrodynamic (MHD) description of a dipolar configuration helmet streamer in which a magnetic bubble structure has been introduced into the closed field region of the helmet streamer. A numerical model is used to study the magnetohydrodynamic evolution of this streamer-bubble system. We find two distinct behaviors characterized by the size of the magnetic bubble: (i) if the bubble's radius is less than or equal to 0.15R c (whereRc is the characteristic length of the helmet streamer), the numerical solution describes a quasi-equilibrium state, and this coronal streamer-bubble structure is stable; and (ii) if the bubble's radius is equal to or larger than 0.25R c the numerical solution describes a non-equilibrium state and, after a period of slow evolution, this coronal streamer bubble structure becomes unstable and breaks up dynamically. In the case of the dipolar configuration helmet streamer,R c is the solar radius. We identify the non-equilibrium solution as a loss of equilibrium of this coronal magnetic structure. Its subsequent dynamic development may be a candidate for some of the commonly observed coronal mass ejections (CMEs).

Keywords

Characteristic Length Magnetic Structure Coronal Mass Ejection Dynamic Development Field Region 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aly, J. J.: 1984,Astrophys. J. 283, 349.Google Scholar
  2. Aly, J. J.: 1991,Astrophys. J. 375, L61.Google Scholar
  3. Burkepile, J. T. and St. Cyr, O. C.: 1993, NCAR Tech. Note 369+STR.Google Scholar
  4. Detman, T. R., Dryer, M., Yeh, T., Han, S. M., Wu, S. T., and McComas, D. J.: 1991, J.Geophys. Res. 96, A6, 9531.Google Scholar
  5. Dryer, M.: 1994,Space Sci. Rev. 67, 363.Google Scholar
  6. Forbes, T. G. and Priest, E. E.: 1982,Solar Phys. 81, 303.Google Scholar
  7. Forbes, T. G. and Priest, E. E.: 1983,Solar Phys. 84, 169.Google Scholar
  8. Forbes, T. G. and Priest, E. E.: 1984,Solar Phys. 94, 315.Google Scholar
  9. Guo, W. P., Wang, J. F., Yao, Y. Q., and Liang, B. X.: 1991,Chinese J. Space Sci. 11, 168.Google Scholar
  10. Harrison, R. A.: 1986,Astron. Astrophys. 162, 283.Google Scholar
  11. Harrison, R. A.: 1991,Adv. Space. Res. 11c, 25.Google Scholar
  12. Harrison, R. A. and Sime, D. G.: 1992,Study of the Solar-Terrestrial System, Proceedings of the 26th ESLAB Symposium, Killarney, Ireland, 16–19 June, 1992, ESA SP-346, p. 289.Google Scholar
  13. Hood, A. W. and Priest, E. R.: 1980,Solar Phys. 66, 113.Google Scholar
  14. Hundhausen, A. J.: 1993,J. Geophys. Res. 98, A8, 13, 177.Google Scholar
  15. Isenberg, P. A., Forbes, T. G., and Démoulin, P.: 1993Astrophys. J. 417, 368.Google Scholar
  16. Kahler, S. W.: 1992,Ann. Rev. Astron. Astrophys. 30, 113.Google Scholar
  17. Klimchuk, J. A., and Sturrock, P. A.: 1989,Astrophys. J. 345, 1034.Google Scholar
  18. Low, B. C.: 1981,Astrophys. J. 251, 352.Google Scholar
  19. Low, B. C.: 1982,Rev. Geophys. Space Phys. 20, 145.Google Scholar
  20. Low, B. C. and Smith, D. F.: 1993,Astrophys. J. 410, 412.Google Scholar
  21. Mikić, Z., Barnes, D. C., and Schnack, D. D.: 1988,Astrophys. J. 328, 830.Google Scholar
  22. Munro, R. H., Gosling, J. T., Hildner, E., MacQueen, R. M., Poland, A. I., and Ross, C. L.: 1979,Solar Phys. 61, 201.Google Scholar
  23. Ramshaw, J. D.: 1983,J. Comp. Phys. 52, 592.Google Scholar
  24. Sime, D. G., MacQueen, R. M., and Hundhausen, A. J.: 1984,J. Geophys. Res. 89, 2113.Google Scholar
  25. Steinolfson, R. S., Suess, S. T., and Wu, S. T.: 1982,Astrophys. J. 255, 730.Google Scholar
  26. Wang, A-H., Wu, S. T., Suess, S. T., and Poletto, G.: 1993,Solar Phys. 147, 55.Google Scholar
  27. Webb, D. F. and Hundhausen, A. J.: 1987,Solar Phys. 108, 383.Google Scholar
  28. Wolfson, R. and Low, B. C.: 1992,Astrophys. J. 391, 353.Google Scholar
  29. Wu, S. T. and Wang, J. F.: 1987,Comp. Method Appl Mech. Eng. 64, 267.Google Scholar
  30. Wu, S. T., Hu, Y. Q., Nakagawa, Y., and Tandberg-Hanssen, E.: 1983,Astrophys. J. 266, 866.Google Scholar
  31. Wu, S. T., Song, M. T., Martens, P. C. H., and Dryer, M.: 1991,Solar Phys. 134, 353.Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • S. T. Wu
    • 1
  • W. P. Guo
    • 1
  • J. F. Wang
    • 2
  1. 1.Center for Space Plasma andAeronomic Research, Department of Mechanical and Aerospace EngineeringThe University of Alabama in HuntsvilleHuntsvilleUSA
  2. 2.Department of Space PhysicsW-Han UniversityWu-Han, HubeiPeople's Republic of China

Personalised recommendations