Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-LTE Model Atom Construction   Model atoms are an integral part in the solution of non-LTE problems. They
comprise the atomic input data that are used to specify the statistical
equilibrium equations and the opacities and emissivities of radiative transfer.
A realistic implementation of the structure and the processes governing the
quantum-mechanical system of an atom is decisive for the successful modelling
of observed spectra. We provide guidelines and suggestions for the construction
of robust and comprehensive model atoms as required in non-LTE line-formation
computations for stellar atmospheres. Emphasis is given on the use of standard
stars for testing model atoms under a wide range of plasma conditions.

29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex