Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An observationally-constrained model of strong magnetic reconnection in
  the solar chromosphere. Atmospheric stratification and estimates of heating
  rates   The evolution of the photospheric magnetic field plays a key role in the
energy transport into the chromosphere and the corona. In active regions, newly
emerging magnetic flux interacts with the pre-existent magnetic field, which
can lead to reconnection events that convert magnetic energy to thermal energy.
We aim to study the heating caused by a strong reconnection event that was
triggered by magnetic flux cancellation. We use imaging-spectropolarimetric
data in the Fe I 6301A, Fe I 6302A, Ca II 8542A and Ca II K obtained with the
CRISP and CHROMIS instruments at the Swedish 1-m Solar Telescope. This data was
inverted using multi-atom, multi-line non-LTE inversions using the STiC code.
The inversion yielded a three-dimensional model of the reconnection event and
surrounding atmosphere, including temperature, velocity, microturbulence,
magnetic file configuration, and the radiative loss rate. The model atmosphere
shows the emergence of magnetic loops with a size of several arcsecs into a
pre-existing predominantly unipolar field. Where the reconnection region is
expected to be, we see an increase in the chromospheric temperature of roughly
2000 K as well as bidirectional flows of the order of 10 km s$^{-1}$ emanating
from the region. We see bright blobs of roughly 0.2 arcsec diameter in the Ca
II K moving at a plane-of-the-sky velocity of order 100 km s$^{-1}$ and a
blueshift of 100 km s$^{-1}$, which we interpret as plasmoids ejected from the
same region. This evidence is consistent with theoretical models of
reconnection and we thus conclude that reconnection is taking place. The
chromospheric radiative losses at the reconnection site in our inferred model
are as high as 160 kW m$^{-2}$, providing a quantitative constraint on
theoretical models that aim to simulate reconnection caused by flux emergence
in the chromosphere.

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The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: eess
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an