Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Different Power-law Indices in the Frequency Distributions of Flares
  with and without Coronal Mass Ejections   We investigated the frequency distributions of flares with and without
coronal mass ejections (CMEs) as a function of flare parameters (peak flux,
fluence, and duration of soft X-ray flares). We used CMEs observed by the Large
Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric
Observatory (SOHO) mission and soft X-ray flares (C3.2 and above) observed by
the GOES satellites during 1996 to 2005. We found that the distributions obey a
power-law of the form: dN/dX~X^-alpha, where X is a flare parameter and dN is
the number of events recorded within the interval [X, X+dX]. For the flares
with (without) CMEs, we obtained the power-law index alpha=1.98+-0.05
(alpha=2.52+-0.03) for the peak flux, alpha=1.79+-0.05 (alpha=2.47+-0.11) for
the fluence, and alpha=2.49+-0.11 (alpha=3.22+-0.15) for the duration. The
power-law indices for flares without CMEs are steeper than those for flares
with CMEs. The larger power-law index for flares without CMEs supports the
possibility that nanoflares contribute to coronal heating.

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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th