MAGNETOHYDRODYNAMIC WAVES AND CORONAL HEATING: UNIFYING EMPIRICAL AND MHD TURBULENCE MODELS

By Igor M. Sokolov, B. van der Holst, R. Oran, C. Downs, Ilia I. Roussev, M. Jin, W. Manchester IV, R. Evans, Tamas I. Gombosi. 2012

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We present a new global model of the solar corona, including the low corona, the transition region, and the top of the chromosphere. The realistic three-dimensional magnetic field is simulated using the data from the photospheric magnetic field measurements. The distinctive feature of the new model is incorporating MHD Alfvén wave turbulence. We assume this turbulence and its nonlinear dissipation to be the only momentum and energy source for heating the coronal plasma and driving the solar wind. The difference between the turbulence dissipation efficiency in coronal holes and that in closed field regions is because the nonlinear cascade rate degrades in strongly anisotropic (imbalanced) turbulence in coronal holes (no inward propagating wave), thus resulting in colder coronal holes, from which the fast solar wind originates. The detailed presentation of the theoretical model is illustrated with the synthetic images for multi-wavelength EUV emission compared with the observations from SDO AIA and STEREO EUVI instruments for the Carrington rotation 2107.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/7de1f1351d64e5a1ede840c12dc81874f069d899

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In Astronomy and Astrophysics

  1. Tamas I. Gombosi
  2. G. T'oth
  3. Igor M. Sokolov
  4. IV WardB.Manchester
  5. Xing Meng
  6. B. Holst
  7. M. Jin
  8. J. McKinney

Citations in the corpus