Space Science Reviews

, Volume 149, Issue 1–4, pp 83–117 | Cite as

Equivalent Electric Circuit Models of Coronal Magnetic Loops and Related Oscillatory Phenomena on the Sun

  • Maxim L. Khodachenko
  • Valerii V. Zaitsev
  • Albert G. Kislyakov
  • Alexander V. Stepanov
Article

Abstract

Coronal loops, which trace closed magnetic field lines, are the primary structural elements of the solar atmosphere. Complex dynamics of solar coronal magnetic loops, together with action of possible subphotospheric dynamo mechanisms, turn the majority of the coronal loops into current-carrying structures. In that connection none of the loops can be considered as isolated from the surroundings. The current-carrying loops moving relative to each other interact via the magnetic field and currents. One of the ways to take into account this interaction consists in application of the equivalent electric circuit models of coronal loops. According to these models, each loop is considered as an equivalent electric LCR-circuit with variable inductive coefficients L, capacitance C, and resistance R, which depend on shape, scale, position of the loop with respect to neighbouring loops, as well as on the plasma parameters in the magnetic tube. Such an approach enables to describe the process of electric current dynamics in the groups of coronal loops, as well as the related dynamical, energy release and radiation processes.

In the present paper we describe the major principles of LCR-circuit models of coronal magnetic loops, and show their application for interpretation of the observed oscillatory phenomena in the loops and in the related radiation.

Keywords

Sun: corona Sun: magnetic fields Sun: coronal loops Sun: oscillations Sun: microwave radiation 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Maxim L. Khodachenko
    • 1
  • Valerii V. Zaitsev
    • 2
  • Albert G. Kislyakov
    • 3
  • Alexander V. Stepanov
    • 4
  1. 1.Space Research InstituteAustrian Academy of SciencesGrazAustria
  2. 2.Institute of Applied PhysicsRussian Academy of SciencesNizhny NovgorodRussia
  3. 3.Lobachevsky State UniversityNizhny NovgorodRussia
  4. 4.Pulkovo ObservatoryRussian Academy of SciencesSt. PetersburgRussia

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