# Torsional Alfvén waves in solar magnetic flux tubes of axial symmetry

@article{Murawski2015TorsionalAW, title={Torsional Alfv{\'e}n waves in solar magnetic flux tubes of axial symmetry}, author={Krzysztof Murawski and A A Solov'ev and Zdzislaw E. Musielak and Abhishek K Srivastava and Jerzy Kraśkiewicz}, journal={Astronomy and Astrophysics}, year={2015}, volume={577} }

Aims. Propagation and energy transfer of torsional Alfven waves in solar magnetic flux tubes of axial symmetry is studied. Methods. An analytical model of a solar magnetic flux tube of axial symmetry is developed by specifying a magnetic flux and deriving general analytical formulas for the equilibrium mass density and gas pressure. The main advantage of this model is that it can be easily adopted to any axisymmetric magnetic structure. The model is used to numerically simulate the propagation…

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## References

SHOWING 1-10 OF 45 REFERENCES

### Nonlinear evolution of torsional Alfvén waves

- Physics
- 2012

Aims. We study the efficiency of the energy transfer to shorter scales in the field-aligned direction – the parallel nonlinear cascade – that accompanies the propagation of torsional Alfven waves…

### Alfvén waves in the solar atmosphere

- Physics
- 1982

The nonlinear propagation of Alfvén waves on open solar magnetic flux tubes is considered. The flux tubes are taken to be vertical and axisymmetric, and they are initially untwisted. The Alfvén waves…

### Magnetohydrodynamic Simulations of Alfvénic Pulse Propagation in Solar Magnetic Flux Tubes: Two-dimensional Slab Geometries

- Physics
- 1997

Two-dimensional magnetohydrodynamic simulations are presented of the evolution of a nonlinear Alfvén wave pulse in the region between the solar photosphere and corona. A magnetic field profile that…

### FREQUENCY FILTERING OF TORSIONAL ALFVÉN WAVES BY CHROMOSPHERIC MAGNETIC FIELD

- Physics
- 2011

In this Letter, we demonstrate how the observation of broadband frequency propagating torsional Alfvén waves in chromospheric magnetic flux tubes can provide valuable insight into their magnetic…

### TEMPERATURE GRADIENTS IN THE SOLAR ATMOSPHERE AND THE ORIGIN OF CUTOFF FREQUENCY FOR TORSIONAL TUBE WAVES

- Physics
- 2010

Fundamental modes supported by a thin magnetic flux tube embedded in the solar atmosphere are typically classified as longitudinal, transverse, and torsional waves. If the tube is isothermal, then…

### Cutoff-free Propagation of Torsional Alfvén Waves along Thin Magnetic Flux Tubes

- Physics
- 2007

Propagation of torsional Alfvén waves along magnetic flux tubes has been extensively studied for many years, but no conclusive results regarding the existence of a cutoff frequency for these waves…

### FAST MAGNETIC TWISTER AND PLASMA PERTURBATIONS IN A THREE-DIMENSIONAL CORONAL ARCADE

- Physics
- 2014

We present results of three-dimensional (3D) numerical simulations of a fast magnetic twister excited above a foot-point of the potential solar coronal arcade that is embedded in the solar atmosphere…

### Magnetohydrostatic equilibrium - I. Three-dimensional open magnetic flux tube in the stratified solar atmosphere

- Physics
- 2013

A system of multiple open magnetic flux tubes spanning the solar photosphere and lower corona is modeled analytically, within a realistic stratified atmosphere subject to solar gravity. This extends…

### Alfvén Wave Model of Spicules and Coronal Heating

- PhysicsProceedings of the International Astronomical Union
- 2007

Magnetohydrodynamic simulations are performed for torsional Alfvén waves propagating along an open magnetic flux tube in the solar atmosphere. It is shown that, if the root mean square of the…

### Nonlinear long-wavelength torsional Alfvén waves

- Physics
- 2011

Aims. We investigate the nonlinear phenomena accompanying long-wavelength torsional waves in solar and stellar coronae. Methods. The second order thin flux-tube approximation is used to determine…