Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of Neutral Phosphorus in the Near Ultraviolet Spectra of
  Late-Type Stars   We report the detection of several absorption lines of neutral phosphorus (P,
Z=15) in archival near ultraviolet spectra obtained with the Space Telescope
Imaging Spectrograph on board the Hubble Space Telescope. We derive phosphorus
abundances or interesting upper limits in 14 late-type stars with metallicities
spanning -3.8<[Fe/H]<-0.1. Previously, phosphorus had only been studied in
Galactic stars with -1.0<[Fe/H]<+0.3. Iron lines reveal abundance offsets
between the optical and ultraviolet regions, and we discuss and apply a
correction factor to account for this offset. In stars with [Fe/H]>-1.0, the
[P/Fe] ratio decreases toward the solar value with increasing metallicity, in
agreement with previous observational studies. In stars with [Fe/H]<-1.0,
<[P/Fe]>=+0.04+/-0.10, which overlaps with the [P/Fe] ratios found in several
high-redshift damped Lyman-alpha systems. This behavior hints at a primary
origin in massive stars.

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The categories of this paper are: cond-mat
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The categories of this paper are: math
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom