http://arxiv.org/abs/2106.05712
Compressional plasma perturbations may cause thermal misbalance between plasma heating and cooling processes. This misbalance significantly affects the dispersion properties of compressional waves providing a feedback between the perturbations and plasmas. It has been shown that Alfv\’en waves may induce longitudinal (compressional) plasma motions. In the present study, we analyze the effects of thermal misbalance caused by longitudinal plasma motions induced by shear Alfv\’en waves. We show that thermal misbalance leads to appearance of exponential bulk flows, which itself modifies the Alfv\’en induced plasma motions. In the case of sinusoidal Alfv\’en waves, we show how the amplitude and phase shift of induced longitudinal motions gain dependence on the Alfv\’en wave frequency while shedding light on its functionality. This feature has been investigated analytically in application to coronal conditions. We also consider the evolution of longitudinal plasma motions induced by the shear sinusoidal Alfv\’en wave by numerical methods before comparing the results obtained with our presented analytical predictions to justify the model under consideration in the present study.
S. Belov, S. Farahani, N. Molevich, et. al.
Fri, 11 Jun 21
40/49
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