Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-LTE Model Atmospheres for Late-Type Stars I. A Collection of Atomic
  Data for Light Neutral and Singly-Ionized Atoms   With the goal of producing a reliable set of model atoms and singly-ionized
ions for use in building NLTE model atmospheres, we have combined measured
energy levels, critically-compiled line transition probabilities, and
resonance-averaged calculations of photoionization cross-sections. A majority
of the elements from Li to Ca are considered, covering most of the important
species in late-type atmospheres. These include elements which contribute free
electrons and/or continuous opacity in the ultraviolet (e.g., Mg, and Si), as
well as trace elements whose abundance determinations rely on ultraviolet lines
(e.g., B from B I lines). The new data complement and, for the species in
common, supersede a previous collection of model atoms originally designed for
use in studies of early-type stars.

31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th