Fe and P abundances in 163 halo stars with HPF Virtual Observatory Resource

Authors
  1. Maas Z.G.
  2. Hawkins K.
  3. Hinkel N.R.
  4. Cargile P.
  5. Janowiecki S.
  6. Nelson T.
  7. Published by
    CDS
Abstract

Phosphorus (P) is a critical element for life on Earth, yet the cosmic production sites of P are relatively uncertain. To understand how P has evolved in the solar neighborhood, we measured abundances for 163 FGK stars over a range of -1.09<[Fe/H]<0.47 using observations from the Habitable-zone Planet Finder instrument on the Hobby-Eberly Telescope. Atmospheric parameters were calculated by fitting a combination of astrometry, photometry, and Fe I line equivalent widths. Phosphorus abundances were measured by matching synthetic spectra to a P I feature at 10529.52{AA}. Our [P/Fe] ratios show that chemical evolution models generally underpredict P over the observed metallicity range. Additionally, we find that the [P/Fe] differs by ~0.1dex between thin disk and thick disk stars that were identified with kinematics. The P abundances were compared with {alpha}-elements, iron-peak, odd-Z, and s-process elements, and we found that the evolution of P in the disk most strongly resembles that of the {alpha}-elements. We also find that molar P/C and N/C ratios for our sample match the scatter seen from other abundance studies. Finally, we measure a [P/Fe]=0.09{+/-}0.1 ratio in one low-{alpha} halo star and probable Gaia-Sausage-Enceladus member, an abundance ratio ~0.3-0.5 dex lower than the other Milky Way disk and halo stars at similar metallicities. Overall, we find that P is likely most significantly produced by massive stars in core-collapse supernovae, based on the largest P abundance survey to date.

Keywords
  1. halo-stars
  2. infrared-astronomy
  3. spectroscopy
  4. chemical-abundances
  5. effective-temperature
Bibliographic source Bibcode
2022AJ....164...61M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/61
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/164/61
Document Object Identifer DOI
doi:10.26093/cds/vizier.51640061

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/61
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/61/table1?

History

2022-11-09T10:20:21Z
Resource record created
2022-11-09T10:20:21Z
Created
2022-12-09T13:18:54Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr