Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic reconnection as a source of jets from a penumbral intrusion
  into a sunspot umbra   We present the results of high resolution co-temporal and co-spatial
photospheric and chromospheric observations of sunspot penumbral intrusions.
The data was taken with the Swedish Solar Telescope (SST) on the Canary
Islands. Time series of Ca\,II H images show a series of transient jets
extending roughly 3000 km above a penumbral intrusion into the umbra. For most
of the time series jets were seen along the whole length of the intruding
bright filament. Some of these jets develop a clear $\lambda$-shaped structure,
with a small loop appearing at their footpoint and lasting for around a minute.
In the framework of earlier studies, the observed transient $\lambda$ shape of
these jets strongly suggests that they are caused by magnetic reconnection
between a curved arcade-like or flux-rope like field in the lower part of the
penumbral intrusion and the more vertical umbral magnetic field forming a
cusp-shaped structure above the penumbral intrusion.

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The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys