On the generation of magnetohydrodynamic waves in a stratified and magnetized fluid. I - Vertical propagation

Abstract

view Abstract Citations (33) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the Generation of Magnetohydrodynamic Waves in a Stratified and Magnetized Fluid. I. Vertical Propagation Musielak, Z. E. ; Rosner, R. Abstract The generation of MHD waves by turbulent motions in a stratified medium with an embedded uniform magnetic field, a topic which is relevant to the study of the solar atmosphere, is considered. Both compressible and incompressible MHD waves are treated in a one-dimensional approach; however, the direction of the background magnetic field is permitted to vary in an arbitrary direction. Theoretical expressions for MHD energy fluxes are obtained as a function of wave frequency and multipole coefficients. It is shown that monopole, dipole, and quadrupole emissions are responsible for the generation of the compressible components of the fast and slow modes. However, the incompressible components and the Alfven modes can be generated by the dipole emission only. Specific results obtained for special magnetic field geometries are discussed for the fast and slow modes. Publication: The Astrophysical Journal Pub Date: April 1987 DOI: 10.1086/165141 Bibcode: 1987ApJ...315..371M Keywords: Magnetohydrodynamic Waves; Solar Atmosphere; Stratified Flow; Wave Generation; Benard Cells; Solar Flux; Turbulence; Wave Propagation; Solar Physics; HYDROMAGNETICS; SUN: ATMOSPHERE; TURBULENCE full text sources ADS | Related Materials (1) Part 2: 1988ApJ...329..376M