Phosphorus Abundances in FGK Stars

We measured phosphorus abundances in 22 FGK dwarfs and giants that span −0.55 < [Fe/H] 0.2 using spectra obtained with the Phoenix high-resolution infrared spectrometer on the Kitt Peak National Observatory Mayall 4 m telescope, the Gemini South Telescope, and the Arcturus spectral atlas. We fit...

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Bibliographic Details
Published in:The Astrophysical journal 2017-06, Vol.841 (2), p.108
Main Authors: Maas, Z. G., Pilachowski, C. A., Cescutti, G.
Format: Article
Language:English
Subjects:
Abundance
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Chemical evolution
COMPARATIVE EVALUATIONS
ELEMENT ABUNDANCE
Evolution
INFRARED SPECTRA
Infrared spectrometers
Iron
Organic chemistry
PHOSPHORUS
RESOLUTION
Spectra
STARS
stars: abundances
TELESCOPES
Yield
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Summary:We measured phosphorus abundances in 22 FGK dwarfs and giants that span −0.55 < [Fe/H] 0.2 using spectra obtained with the Phoenix high-resolution infrared spectrometer on the Kitt Peak National Observatory Mayall 4 m telescope, the Gemini South Telescope, and the Arcturus spectral atlas. We fit synthetic spectra to the P i feature at 10581 to determine abundances for our sample. Our results are consistent with previously measured phosphorus abundances; the average [P/Fe] ratio measured in [Fe/H] bins of 0.2 dex for our stars are within ∼1 compared to averages from other IR phosphorus studies. Our study provides more evidence that models of chemical evolution using the results of theoretical yields are underproducing phosphorus compared to the observed abundances. Our data better fit a chemical evolution model with phosphorus yields increased by a factor of 2.75 compared to models with unadjusted yields. We also found average [P/Si] = 0.02 0.07 and [P/S] = 0.15 0.15 for our sample, showing no significant deviations from the solar ratios for [P/Si] and [P/S] ratios.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aa7050