Moving Magnetic Features (MMFs)

Chapter
First Online:
Part of the Astrophysics and Space Science Library book series (ASSL, volume 417)

Abstract

In highly dynamic environment of sunspot areas with various sources and sink of energy, small-scale flux tubes do not in general obey the local conservation laws, nor do the ensembles of flux tubes that exhibit a complex collective phenomena. Some of the most spectacular phenomena are associated with the so-called Moving Magnetic Features, MMFs, small bipoles streaming radially outward the sunspot penumbra and exhibiting various mysterious properties. For example, they are observed to propagate faster than background mass flows and sometimes even upstream. Altogether, the properties of the MMFs are inconsistent with the energy and momentum conservation laws and require the approach of a nonconservative, energetically open systems. In this chapter we shall study these amazing features, their observed characteristics, and their impact on the overlying atmosphere. We shall apply the methods of nonconservative systems to understand their behavior. We will also see the negative energy waves in action, and associated formation of shocks and solitons.

Keywords

Solitary Wave Flux Tube Shear Velocity Coronal Loop Dark Soliton 
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. P.N. Bernasconi et al., Sol. Phys. 209, 119 (2003)Google Scholar
  2. N. Brickhouse, B. LaBonte, Sol. Phys. 115, 43 (1988)Google Scholar
  3. B. Coppi, M.N. Rosenbluth, R. Sudan, Ann. Phys. 55, 201 (1969)Google Scholar
  4. V.M. Dikasov, L.I. Rudakov, D.D. Ryutov, Sov. Phys. JETP 21, 1965 (1965)Google Scholar
  5. I. Fushiki,  J.I. Sakai, Sol. Phys. 161, 317 (1995)Google Scholar
  6. H. Hagenaar, R. Shine, Astrophys. J. 635, 659 (2005)Google Scholar
  7. K.  Harvey, J. Harvey, Sol. Phys. 28, 61 (1973)Google Scholar
  8. B.B. Kadomtzev et al.,  Sov. Phys. JETP 20, 1517 (1964)Google Scholar
  9. V.I. Karpman, Nonlinear Waves in Dispersive Media (Pergamon Press, London, 1975)Google Scholar
  10. J.W. Lee, Sol. Phys. 139, 267 (1992)Google Scholar
  11. P. Maltby, E. Avrett, M. Carlsson, O. Kjeldseth-Moe, R. Kuruz and R. Loeser, Astrophys. J. 306, 284 (1986)Google Scholar
  12. L.A. Ostrovsky, S.A. Rybak, L.Sh. Tsimring, Sov. Phys. Uspekhi 29, 1040 (1986)Google Scholar
  13. M.P. Ryutova, Sov. Phys. JETP 67(8), 1594 (1988)Google Scholar
  14. M. Ryutova, R. Shine, A. Title, J.I. Sakai, Astrophys. J. 492, 402 (1998)Google Scholar
  15. M. Ryutova, T. Tarbell, R. Shine, Sol. Phys. 213, 231 (2003)Google Scholar
  16. M. Ryutova, H. Hagennar, Sol. Phys. 246, 281 (2007)Google Scholar
  17. M. Ryutova, H. Hagennar, A. Title, Astrophys. J. 656, L45 (2007)Google Scholar
  18. N.R. Sheeley, Sol. Phys. 1, 171 (1967)Google Scholar
  19. R.A. Shine, A.M. Title, T.D. Tarbell, K.P. Topka, Science 238, 1203 (1987)Google Scholar
  20. R. Shine, A. Title, in Encyclopedia of Astronomy and Astrophysics, ed. by P. Murdin (IOP, Bristol, 2001)Google Scholar
  21. M. Suzuki,  J.I. Sakai, Astrophys. J. 465, 393 (1996)Google Scholar
  22. D. Vrabec, in Solar Magnetic Fields. IAU Symposium 43, vol. 329, ed. by R. Howard (Reidel, Dordrecht, 1971)Google Scholar
  23. G.B. Whitham, Linear and Nonlinear Waves (Wiley, New York, 1974)Google Scholar
  24. P.R. Wilson, Sol. Phys. 106, 1 (1986)Google Scholar
  25. V.B. Yurchyshyn, H. Wang, P. Goode, Astrophys. J. 550, 470 (2001)Google Scholar
  26. J. Zhang, S.K. Solanki, J. Wang, Astron. Astrophys. 399, 755 (2003)Google Scholar
  27. F. Zuccarello et al., Astron. Astrophys. 500, 5 (2009)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Lawrence Livermore National LaboratoryInstitute of Geophysics and Planetary PhysicsLivermoreUSA

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