Document Type : Original Article
Author
Faculty of Physics
Abstract
Magnetoacoustic waves are longitudinal waves in the presence of magnetic forces which can be generated and propagated in the solar atmospheric waveguides, for examples: sunspots in the photosphere, spicules in the chromosphere, coronal loops in the corona and etc. Each of these phenomena as the waveguides can be considered in the form of a magnetic flux tube, and the behavior of waves in them can be studied by providing a model. For this purpose, a two-dimensional Cartesian model is used to solve the wave equations, and a simulation code is used to solve them numerically. In this work, the effects of gravity and viscosity are considered in the equations of the magnetohydrodynamic (MHD) waves. Our goal is to study and investigate the damping of the magnetoacoustic-gravity waves in solar magnetic flux tubes. The results which are presented in the form of time-space diagrams of the velocity and magnetic field variables, will effectively show the process of the wave damping.
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