Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on "The Coronal Heating Paradox" by M.J. Aschwanden, A.
  Winebarger, D. Tsiklauri and H. Peter [2007, Astrophys J., 659, 1673]   We point out the priority of our paper (Mahajan et al. 2001, Phys. Plasmas,
8, 1340) over (Aschwanden et al. 2007, Astrophys J., 659, 1673) in introducing
the term "Formation and primary heating of the solar corona" working out
explicit models (theory as well as simulation) for coronal structure formation
and heating. On analyzing the Aschwanden et al. (2007) scenario of coronal
heating process (shifted to the chromospheric heating) we stress, that for
efficient loop formation, the primary upflows of plasma in
chromosphere/transition region should be relatively cold and fast (as opposed
to hot). It is during trapping and accumulation in closed field structures,
that the flows thermalize (due to the dissipation of the short scale flow
energy) leading to a bright and hot coronal structure. The formation and
primary heating of a closed coronal structure (loop at the end) are
simultaneous and a process like the "filling of the empty coronal loop by hot
upflows" is purely speculative and totally unlikely.

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The categories of this paper are: physics
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The categories of this paper are: q-fin
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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: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph