Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oxygen line formation in 3D hydrodynamical model atmospheres   The formation of [O I], O I and OH lines in metal-poor stars has been studied
by means of 3D hydrodynamical model atmospheres. For O I detailed 3D non-LTE
calculations have been performed. While the influence of 3D model atmospheres
is minor for [O I] and O I lines, the very low temperatures encountered at low
metallicities have a drastic impact on the OH lines. As a result, the derived O
abundances are found to be systematically overestimated in 1D analyses, casting
doubts on the recent claims for a monotonic increase in [O/Fe] towards lower
metallicities.

9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph