Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical Study of GOES X-ray Quasi-Periodic Pulsations in Solar
  Flares   Small amplitude quasi-periodic pulsations (QPPs) detected in soft X-ray
emission are commonplace in many flares. To date, the underpinning processes
resulting in the QPPs are unknown. In this paper, we attempt to constrain the
prevalence of \textit{stationary} QPPs in the largest statistical study to
date, including a study of the relationship of QPP periods to the properties of
the flaring active region, flare ribbons, and CME affiliation. We build upon
the work of \cite{inglis2016} and use a model comparison test to search for
significant power in the Fourier spectra of lightcurves of the GOES 1--8~\AA\
channel. We analyze all X-, M- and C- class flares of the past solar cycle, a
total of 5519 flares, and search for periodicity in the 6-300~s timescale
range. Approximately 46\% of X-class, 29\% of M-class and 7\% of C-class flares
show evidence of stationary QPPs, with periods that follow a log-normal
distribution peaked at 20~s. The QPP periods were found to be independent of
flare magnitude, however a positive correlation was found between QPP period
and flare duration. No dependence of the QPP periods to the global active
region properties was identified. A positive correlation was found between QPPs
and ribbon properties including unsigned magnetic flux, ribbon area and ribbon
separation distance. We found that both flares with and without an associated
CME can host QPPs. Furthermore, we demonstrate that for X- and M- class flares,
decay phase QPPs have statistically longer periods than impulsive phase QPPs.

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The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga