Nonlinear Coupling of Alfvén and Slow Magnetoacoustic Waves in Partially Ionized Solar Plasmas: The Effect of Thermal Misbalance
نویسندگان
چکیده
Solar chromosphere and photosphere, as well solar atmospheric structures, such prominences spicules, are made of partially ionized plasmas. Observations have reported the presence damped or amplified oscillations in these plasmas, which been interpreted terms magnetohydrodynamic (MHD) waves. Slow magnetoacoustic waves could be responsible for oscillations. The present study investigates temporal behavior field-aligned motions that represent slow excited a prominence plasma by ponderomotive force. Starting from single-fluid MHD equations, including radiative losses, heating mechanism ambipolar diffusion, using regular perturbation method, first- second-order partial differential equations derived. By numerically solving describing motions, longitudinal velocity perturbations is obtained. damping amplification can explained heating–cooling misbalance, effect due to diffusion variation first adiabatic exponent with temperature ionization degree.
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ژورنال
عنوان ژورنال: Physics
سال: 2023
ISSN: ['2624-8174']
DOI: https://doi.org/10.3390/physics5020025