Phase mixing of propagating Alfven waves in a stratified atmosphere: Solar spicules
arXiv:1210.0485 · doi:10.1007/s10509-012-1036-3
Abstract
Alfvenic waves are thought to play an important role in coronal heating and solar wind acceleration. Recent observations by Hinode/SOT showed that the spicules mostly exhibit upward propagating high frequency waves. Here we investigate the dissipation of such waves due to phase mixing in stratified environment of solar spicules. Since they are highly dynamic structures with speeds at about significant fractions of the Alfven phase speed, we take into account the effects of steady flows. Our numerical simulations show that in the presence of stratification due to gravity, damping takes place in space than in time. The exponential damping low, exp(-At^3), is valid under spicule conditions, however the calculated damping time is much longer than the reported spicule lifetimes from observations.
arXiv commentPublished in Astrophysics and Space Science. arXiv admin note: substantial text overlap with arXiv:1209.2111
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Cited by in corpus (5)
- Estimating the contribution of Alfvén waves to the process of heating the quiet solar corona
- Phase mixing of standing Alfven waves with shear flows in solar spicules
- On the role of transition region on the Alfven wave phase mixing in solar spicules
- Non-linear damping of visco-resistive Alfven waves in solar spicules
- Transverse oscillations in solar spicules induced by propagating Alfvenic pulses