On ion-cyclotron-resonance heating of the corona and solar wind

E. Marsch (1) , C. Vocks (2) , C.-Y. Tu (3)

1 MPI Aeronomie - Max-Planck-Institut für Aeronomie
2 AIP - Astrophysikalisches Institut Potsdam
3 Department of Geophysics

This paper concisely summarizes and critically reviews recent work by the authors on models of the heating of the solar corona by resonance of ions with high-frequency waves (up to the proton cyclotron frequency). The quasi-linear theory of pitch angle diffusion is presented in connection with relevant solar wind proton observations. Hybrid fluid-kinetic model equations, which include wave-particle interactions and collisions, are derived. Numerical solutions are discussed, representative of the inner corona and near-Sun solar wind. A semi-kinetic model for reduced velocity distributions is presented, yielding kinetic results for heavy ions in the solar corona. It is concluded that a self-consistent treatment of particle distributions and wave spectra is required, in order to adequately describe coronal physics and to obtain agreement with observations.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]; Sciences de la Terre

E. Marsch, C. Vocks, C.-Y. Tu. On ion-cyclotron-resonance heating of the corona and solar wind. Nonlinear Processes in Geophysics, 2003, 10 (1/2), pp.101-112. ⟨hal-00302182⟩