Fast-to-Alfvén Mode Conversion and Ambipolar Heating in Structured Media. I. Simplified Cold Plasma Model

Bibcode
2019ApJ...885...58C
DOI
10.3847/1538-4357/ab3bce
Cally, Paul S.; Khomenko, Elena
Bibliographical reference

The Astrophysical Journal

Advertised on:
11
2019
Journal
The Astrophysical Journal
Number of authors
2
IAC number of authors
1
Citations
14
Refereed citations
14
Description
Linear fast magnetoacoustic waves are introduced into a cold stratified plasma model made up of a doubly periodic ensemble of straight diminished-Alfvén-speed tubes. Coupling between fast and Alfvén waves is produced by stratification and the tube structures, and scattering is strong for wavelengths comparable to the inter-tube separation. Ambipolar diffusion is found to be enhanced by the structuring and is potentially significant at high frequencies. The production of kink waves is discussed and modeled. It is found that the tube structure significantly alters the wave energy reaching the corona and the form that it takes, even for moderate fast-slow tube contrast, with Alfvén waves becoming prominent.
Related projects
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Solar and Stellar Magnetism

Magnetic fields are at the base of star formation and stellar structure and evolution. When stars are born, magnetic fields brake the rotation during the collapse of the mollecular cloud. In the end of the life of a star, magnetic fields can play a key role in the form of the strong winds that lead to the last stages of stellar evolution. During

Tobías
Felipe García
In progress
Type
Refereed
Alfven waves
Solar atmospheric motions
Solar chromosphere
Solar Physics (FS)

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