Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An astrophysical oscillator strength for the SII 94.7 nm resonance line
  and S abundances in DLAs   By using UV spectra for the O star HD 93521 taken with the ORFEUS II echelle
spectrograph, we determine an ``astrophysical'' f value for the SII 94.7 nm
line: f = 0.00498 (+0.00172)(-0.00138), error at 1 sigma level.This is almost a
factor of 30 smaller than the guessed value found in the Kurucz database
(f=0.1472), which was up to now the only one available for this transition. We
use our ``astrophysical'' f to investigate the S abundance in two Damped
Ly-alpha absorption systems (DLAs) observed with UVES at the ESO 8.2m Kueyen
telescope. In the case of the absorber at zabs=3.02486 towards QSO 0347-3819 we
find a sulphur column density which is consistent, within errors, with that
determined by Centurion et al by means of the 125.9 nm line, thus providing an
external check on the accuracy of our f value. For the damped absorber at
zabs=4.4680 towards BR J0307-4945 we determine a high value of the S abundance,
which, however, is probably the result of blending with Ly-alpha forest lines.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin