Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The generation and damping of propagating MHD kink waves in the solar
  atmosphere   The source of the non-thermal energy required for the heating of the upper
solar atmosphere to temperatures in excess of a million degrees and the
acceleration of the solar wind to hundreds of kilometres per second is still
unclear. One such mechanism for providing the required energy flux is
incompressible torsional Alfv\'en and kink magnetohydrodynamic (MHD) waves,
which are magnetically dominated waves supported by the Sun's pervasive and
complex magnetic field. In particular, propagating MHD kink waves have recently
been observed to be ubiquitous throughout the solar atmosphere, but, until now,
critical details of the transport of the kink wave energy throughout the Sun's
atmosphere were unclear. Here, the ubiquity of the waves is exploited for
statistical studies in the highly dynamic solar chromosphere. This large-scale
investigation allows for the determination of the chromospheric kink wave
velocity power spectra, a missing link necessary for determining the energy
transport between the photosphere and corona. Crucially, the power spectra
contains evidence for horizontal photospheric motions being the main mechanism
for kink wave generation in the quiescent Sun. In addition, a comparison to
measured coronal power spectra is provided, revealing frequency-dependent
transmission profiles suggesting there is enhanced damping of kink waves in the
lower corona.

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The categories of this paper are: hep-lat
3
The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg