Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Plasma heating in solar flares and their soft and hard X-ray emissions   In this paper, the energy budgets of two single-loop like flares observed in
X- ray are analysed under the assumption that non-thermal electrons (NTEs) are
the only source of plasma heating during all phases of both events. The flares
were observed by RHESSI and GOES on February 20th, 2002 and June 2nd, 2002,
respectively. Using a 1D hydrodynamic code for both flares the energy deposited
in the chromosphere was derived applying RHESSI observational data. The use of
the Fokker-Planck formalism permits the calculation of distributions of the
NTEs in flaring loops, thus spatial distributions of the X-ray non-thermal
emissions and integral fluxes for the selected energy ranges which were
compared with the observed ones. The best compatibility of the model with the
observations was obtained for the June 2nd, 2002 event in both the 0.5-4 A GOES
range and total fluxes in the 6-12 keV, 12-25 keV, 20-25 keV and 50- 100 keV
energy bands. Results of photometry of the individual flaring structures in a
high energy range shows that the best compliance occurred for the June 2nd,
2002 flare, where the synthesized emissions were 30% or more higher than the
observed emissions. Some part of these differences may be caused by inevitable
flaws of the applied methodology, like by an assumption that the model of the
flare is symmetric and there are no differences in the emissions originating
from the feet of the flare's loop and by relative simplicity of the applied
numerical 1D code and procedures. Despite these problems, a collation of
modelled results with observations shows that soft and hard X-ray emissions
observed for analysed single-loop like events may be fully explained by
electron beam-driven evaporation only.

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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
5
The categories of this paper are: gr-qc