Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of kink waves and their reconnection-like origin in solar
  spicules   We analyze the time series of Ca II H-line obtained from Hinode/SOT on the
solar limb. We follow three cases of upwardly propagating kink waves along a
spicule and inverted Y-shaped structures at the cusp of it. The time-distance
analysis shows that the axis of spicule undergoes quasi-periodic transverse
displacement at different heights from the photosphere. The mean period of
transverse displacement is ~ 175 s and the mean amplitude is 1 arc\,sec. The
oscillation periods are increasing linearly with height which may be counted as
the signature that the spicule is working as a low pass filter and allows only
the low frequencies to propagate towards higher heights. The oscillations
amplitude is increasing with height due to decrease in density. The phase
speeds are increasing until some heights and then decreasing which may be
related to the small scale reconnection at the spicule basis. We conclude that
transversal displacement of spicules axis can be related to the propagation of
kink waves along them. Moreover, we observe signatures of small-scale magnetic
reconnection at the cusp of spicules which may excite kink waves.

20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex