Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi-periodic Fast-mode Wave Trains Within a Global EUV Wave and
  Sequential Transverse Oscillations Detected by SDO/AIA   We present the first unambiguous detection of quasi-periodic wave trains
within the broad pulse of a global EUV wave (so-called "EIT wave") occurring on
the limb. These wave trains, running ahead of the lateral CME front of 2-4
times slower, coherently travel to distances $>R_{sun}/2$ along the solar
surface, with initial velocities up to 1400 km/s decelerating to ~650 km/s. The
rapid expansion of the CME initiated at an elevated height of 110 Mm produces a
strong downward and lateral compression, which may play an important role in
driving the primary EUV wave and shaping its front forwardly inclined toward
the solar surface. The waves have a dominant 2 min periodicity that matches the
X-ray flare pulsations, suggesting a causal connection. The arrival of the
leading EUV wave front at increasing distances produces an uninterrupted chain
sequence of deflections and/or transverse (likely fast kink mode) oscillations
of local structures, including a flux-rope coronal cavity and its embedded
filament with delayed onsets consistent with the wave travel time at an
elevated (by ~50%) velocity within it. This suggests that the EUV wave
penetrates through a topological separatrix surface into the cavity, unexpected
from CME caused magnetic reconfiguration. These observations, when taken
together, provide compelling evidence of the fast-mode MHD wave nature of the
{\it primary (outer) fast component} of a global EUV wave, running ahead of the
{\it secondary (inner) slow} component of CME-caused restructuring.

23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con