Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A non-LTE study of silicon abundances in giant stars from the Si I
  infrared lines in the zJ-band   We investigate the feasibility of the Si I infrared (IR) lines as Si
abundance indicators for giant stars. We find that Si abundances obtained from
the Si I IR lines based on the local thermodynamic equilibrium (LTE) analysis
show large line-to-line scatter (mean value of 0.13dex), and are higher than
those from the optical lines. However, when the non-LTE effects are taken into
account, the line-to-line scatter reduces significantly (mean value of
0.06dex), and the Si abundances are consistent with those from the optical
lines. The typical average non-LTE correction of [Si/Fe] for our sample stars
is about $-$0.35dex. Our results demonstrate that the Si I IR lines could be
reliable abundance indicators provided that the non-LTE effects are properly
taken into account.

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The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph