Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-LTE inversions of the Mg II h&k and UV triplet lines   The Mg II h&k lines are powerful diagnostics for studying the solar
chromosphere. They have become particularly popular with the launch of the IRIS
satellite, and a number of studies that include these lines have lead to great
progress in understanding chromospheric heating, in many cases thanks to the
support from 3D MHD simulations. In this study we utilize another approach to
analyze observations: non-LTE inversions of the Mg II h&k and UV triplet lines
including the effects of partial redistribution. Our inversion code attempts to
construct a model atmosphere that is compatible with the observed spectra. We
have assessed the capabilities and limitations of the inversions using the FALC
atmosphere and a snapshot from a 3D radiation-MHD simulation. We find that Mg
II h&k allow reconstructing a model atmosphere from the middle photosphere to
the transition region. We have also explored the capabilities of a
multi-line/multi-atom setup, including the Mg II h&k, the Ca II 854.2 nm and
the Fe I 630.25 lines to recover the full stratification of physical
parameters, including the magnetic field vector, from the photosphere to the
chromosphere. Finally, we present the first inversions of observed IRIS spectra
from quiet-Sun, plage and sunspot, with very promising results.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th