Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar Population Astrophysics (SPA) with the TNG: Identification of a
  Sulphur line at lambda(air) = 1063.600nm in GIANO-B stellar spectra   Context. In the advent of new infrared, high-resolution spectrometers,
accurate and precise atomic data in the infrared is urgently needed.
Identifications, wavelengths, strengths, broadening and hyper-fine splitting
parameters of stellar lines in the near-IR are in many cases not accurate
enough to model observed spectra, and in other cases even non existing. Some
stellar features are unidentified. Aims. The aim with this work is to identify
a spectral feature at lambda(vac) = 1063.891 nm or lambda(air) = 1063.600 nm
seen in spectra of stars of different spectral types, observed with the GIANO-B
spectrometer. Methods. Searching for spectral lines to match the unidentified
feature in linelists from standard atomic databases was not successful.
However, by investigating the original, published laboratory data we were able
to identify the feature and solve the problem. To confirm its identification,
we model the presumed stellar line in the solar intensity spectrum and find an
excellent match. Results. We find that the observed spectral feature is a
stellar line originating from the 4s'-4p' transition in S I, and that the
reason for its absence in atomic line databases is a neglected air-to-vacuum
correction in the original laboratory measurements from 1967 for this line
only. From interpolation we determine the laboratory wavelength of the S I line
to be lambda(vac) = 1063.8908 nm or lambda(air) = 1063.5993 nm, and the
excitation energy of the upper level to be 9.74978 eV.

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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: supr-con