Journal
ASTRONOMICAL JOURNAL
Volume 158, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/ab4a1a
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Funding
- National Aeronautics and Space Administration
- National Science Foundation
- Indiana University College of Arts and Sciences
- European Union Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [664931]
- EU COST Action [CA16117]
- Kirkwood Research Fund at Indiana University
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We have measured phosphorus abundances in nine disk stars between 1 < [Fe/H] < 0.5 and in 12 members of the Hyades open cluster using two P I lines at 1.06 m. High-resolution infrared spectra were obtained using Phoenix on Gemini South and abundances were determined by comparing synthetic spectra to the observations. The average abundance for the dwarf stars in our Hyades sample was = 0.01;;0.06 and ;m P I lines are not subjected to temperature- or luminosity-dependent systematic effects at high metallicities. Our [P/Fe] ratios measured in disk stars are consistent with chemical evolution models with P yields increased by a factor of 2.75. We find that [P/O], [P/Mg], [P/Si], and [P/Ti] ratios are consistent with the solar ratio over a range of 1.0 < [Fe/H] < 0.2 with the [P/Si] ratio increasing by 0.10.2 dex at the lowest [Fe/H] ratios. Finally, the evolution of [P/Fe] with age is similar to other elements, providing evidence that P is produced at the same sites.
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