EGU22-3911
https://doi.org/10.5194/egusphere-egu22-3911
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Flux tube dependent propagation of Alfvén waves in the solar corona

Chaitanya Prasad Sishtla, Jens Pomoell, Emilia Kilpua, Simon Good, Farhad Daei, and Minna Palmroth
Chaitanya Prasad Sishtla et al.
  • University of Helsinki, Physics, Finland (chaitanya.sishtla@helsinki.fi)
Alfvén wave turbulence has emerged as an important heating mechanism to accelerate the solar wind. The generation of this turbulent heating is dependent on the presence and subsequent interaction of counter-propagating alfvén waves. This requires us to understand the propagation and evolution of alfvén waves in the solar wind in order to develop an understanding of the relationship between turbulent heating and solar wind parameters. In this paper we aim to study the  response  of  the  solar  wind  upon  injecting  monochromatic  single frequency alfvén waves at the base of the corona for various magnetic flux tube geometries. We use an ideal magnetohydrodynamic (MHD) model using an adiabatic equation of state. An alfvén pump wave is injected into the quiet solar wind by perturbing the transverse magnetic field and velocity components. The alfvén waves were found to be reflected due to the development of the parametric decay instability (PDI). Further investigation revealed that the PDI was suppressed both by efficient reflections at low frequencies as well as magnetic flux tube geometries.

How to cite: Sishtla, C. P., Pomoell, J., Kilpua, E., Good, S., Daei, F., and Palmroth, M.: Flux tube dependent propagation of Alfvén waves in the solar corona, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-3911, https://doi.org/10.5194/egusphere-egu22-3911, 2022.

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