Electron heating by large-amplitude shear Alfvén waves in the upper chromosphere with a force-free magnetic configuration
Laboratory for Plasma Astrophysics, Faculty of Engineering, Toyama University, 3190 Gofuku, Toyama 930-8555, Japan e-mail: email@example.com
Accepted: 18 January 2006
Aims.We investigate how large-amplitude shear Alfvén waves (AWs) can heat the upper chromosphere with a magnetic force-free configuration.
Methods. We used a 2D3V fully relativistic electromagnetic particle-in-cell simulation.
Results. We found that the shear AWs with linear polarization and about one period can excite quasi-electrostatic waves driven by the modified two-stream instability, resulting in electron heating within a short time . The results could be applied to the electron heating in the upper chromosphere where small-scale magnetic flux tubes are interacting with each other, making shear magnetic field structures between them.
Key words: acceleration of particles / Sun: chromosphere / waves
© ESO, 2006