Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mode Converting Alfv\'{e}n Waves from Magnetic Reconnection Enhancing
  the Energy Source for the Aurora Borealis   Previous studies have concluded that the Hall magnetic field structures
generated during magnetic reconnection are carried away by kinetic Alfv\'{e}n
waves (KAW). Here we apply a kinetic simulation with an ion/electron mass ratio
closer to its natural value and find that much-reduced damping rates permit the
KAW to convert into shear Alfv\'{e}n waves (SAW). For magnetotail reconnection
these SAW provides efficient transport of wave energy, enhancing the energy
input for the Aurora Borealis by orders of magnitude above previous estimates.

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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn