Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Solar Magnetic-fan Flaring Arch Heated by Non-thermal Particles and
  Hot Plasma from an X-ray Jet Eruption   We have investigated an M1.3 limb flare, which develops as a magnetic
loop/arch that fans out from an X-ray jet. Using Hinode/EIS, we found that the
temperature increases with height to a value of over 10$^{7}$ K at the loop-top
during the flare. The measured Doppler velocity (redshifts of 100$-$500 km
s$^{-1}$) and the non-thermal velocity ($\geq$100 km s$^{-1}$) from Fe XXIV
also increase with loop height. The electron density increases from
$0.3\times10^{9}$ cm$^{-3}$ early in the flare rise to $1.3\times10^{9}$
cm$^{-3}$ after the flare peak. The 3-D structure of the loop derived with
STEREO/EUVI indicates that the strong redshift in the loop-top region is due to
upflowing plasma originating from the jet. Both hard X-ray and soft X-ray
emission from RHESSI were only seen as footpoint brightenings during the
impulsive phase of the flare, then, soft X-ray emission moves to the loop-top
in the decay phase. Based on the temperature and density measurements and
theoretical cooling models, the temperature evolution of the flare arch is
consistent with impulsive heating during the jet eruption followed by
conductive cooling via evaporation and minor prolonged heating in the top of
the fan loop. Investigating the magnetic field topology and squashing factor
map from SDO/HMI, we conclude that the observed magnetic-fan flaring arch is
mostly heated from low atmospheric reconnection accompanying the jet ejection,
instead of from reconnection above the arch as expected in the standard flare
model.

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The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg