Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observations of quasi-periodic phenomena associated with a large blowout
  solar jet   A variety of periodic phenomena have been observed in conjunction with large
solar jets. We aim to find further evidence for {(quasi-)}periodic behaviour in
solar jets and determine what the periodic behaviour can tell us about the
excitation mechanism and formation process of the large solar jet. Using the
304 {\AA} (He-II), 171 {\AA} (Fe IX), 193 {\AA} (Fe XII/XXIV) and 131 {\AA} (Fe
VIII/XXI) filters on-board the Solar Dynamic Observatory (SDO) Atmospheric
Imaging Assembly (AIA), we investigate the intensity oscillations associated
with a solar jet. Evidence is provided for multiple magnetic reconnection
events occurring between a pre-twisted, closed field and open field lines.
Components of the jet are seen in multiple SDO/AIA filters covering a wide
range of temperatures, suggesting the jet can be classified as a blowout jet.
Two bright, elongated features are observed to be co-spatial with the large
jet, appearing at the jet's footpoints. Investigation of these features reveal
they are defined by multiple plasma ejections. The ejecta display
(quasi-)periodic behaviour on timescales of 50 s and have rise velocities of
40-150 km\,s$^{-1}$ along the open field lines. Due to the suggestion that the
large jet is reconnection-driven and the observed properties of the ejecta, we
further propose that these ejecta events are similar to type-II spicules. The
bright features also display (quasi)-periodic intensity perturbations on the
timescale of 300 s. Possible explanations for the existence of the
(quasi-)periodic perturbations in terms of jet dynamics and the response of the
transition region are discussed.

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The categories of this paper are: math
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc