J/AJ/164/61 Fe and P abundances in 163 halo stars with HPF (Maas+, 2022)
The Galactic Distribution of Phosphorus: A Survey of 163 Disk and Halo Stars.
Maas Z.G., Hawkins K., Hinkel N.R., Cargile P., Janowiecki S., Nelson T.
<Astron. J., 164, 61 (2022)>
=2022AJ....164...61M 2022AJ....164...61M
ADC_Keywords: Stars, halo; Spectra, infrared; Abundances; Effective temperatures
Keywords: Stellar abundances ; Galaxy chemical evolution
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 10529.52Å. 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 α-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
α-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-α 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.
Description:
Observations were performed using the Habitable-zone Planet Finder
(HPF) spectograph on the Hobby-Eberly Telescope (HET). HPF is
fiber-fed and observes an approximate wavelength range of
8000-13000Å with a resolution R∼50000. Target stars were observed
between 2020 August and 2020 December.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 170 163 *Parallaxes and observation summary
table3.dat 64 163 Atmospheric parameter and abundances
table6.dat 62 163 Stellar kinematics and galactic population
membership probabilities
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Note on table1.dat : Sources of photometry and parallax: J, H, and Ks
from 2MASS; VT and BT from ESA and Tycho-2; W1 and W2 photometry from
WISE and G, BP, RP, parallax, and parallax uncertainty from Gaia EDR3.
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See also:
B/pastel : The PASTEL catalogue (Soubiran+, 2016-)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
VI/39 : Model Atmospheres (Kurucz, 1979)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
J/A+A/467/665 : Manganese abundances in the Galactic disk (Feltzing+, 2007)
J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/A+A/530/A15 : Abundances of 94 stars (Nissen+, 2011)
J/ApJ/764/78 : Oxygen abundances in nearby FGK stars (Ramirez+, 2013)
J/A+A/562/A71 : Chemical abundances solar neighbourhood dwarfs (Bensby+, 2014)
J/AJ/148/54 : The Hypatia Catalog ((Hinkel+, 2014)
J/ApJ/797/69 : Abundances of late-type stars (Roederer+, 2014)
J/ApJ/824/L19 : Carbon-enhanced metal-poor star BD+44493 EWs (Roederer+, 2016)
J/A+A/594/A43 : APOGEE/Kepler sample stars abundances (Hawkins+, 2016)
J/ApJ/865/44 : Abundances of evolved stars from IGRINS. I. (Afsar+, 2018)
J/ApJ/865/68 : Abundances for 79 Sun-like stars within 100pc (Bedell+, 2018)
J/AJ/156/126 : Stellar parameters & abund. BACCHUS analysis (Jonsson+, 2018)
J/ApJ/875/129 : FeI lines in NIR spectra of Arcturus & mu Leo (Kondo+, 2019)
J/AJ/158/219 : Phosphorus abundances in Hyades & Galactic disk (Maas+, 2019)
J/MNRAS/493/5195 : Milky Way halo stars ages and kinematics (Das+, 2020)
J/ApJ/891/39 : LAMOST DR3 metal-poor stars of the Galactic halo (Yuan+, 2020)
J/A+A/651/A79 : TO stars metallicity estimate (Bonifacio+, 2021)
J/A+A/645/A106 : Atomic data for the Gaia-ESO Survey (Heiter+, 2021)
J/AJ/161/128 : Chemical composition of 15 red giant stars HPF (Sneden+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Object ID
15- 18 I4 yr Obs.Y [2020] Date observed, year
20- 21 I2 "month" Obs.M Date observed, numeric month
23- 24 I2 d Obs.D Date observed, day in month
26- 34 F9.5 deg RAdeg [1/360] Right Ascension (ICRS)
36- 43 F8.5 deg DEdeg [-5/60] Declination (ICRS)
45- 47 I3 --- SNR [50/361] Signal-to-noise ratio at 16000Å
49- 54 F6.3 mag Gmag [4.922/10.26] Gaia G-band magnitude
56- 60 F5.3 mag e_Gmag [0.003/0.005] Gaia G error
62- 67 F6.3 mag BPmag [5.211/10.74] Gaia BP-band magnitude
69- 73 F5.3 mag e_BPmag [0.003/0.004] Gaia BP error
75- 79 F5.3 mag RPmag [4.446/9.614] Gaia RP-band magnitude
81- 85 F5.3 mag e_RPmag [0.004/0.005] Gaia RP error
87- 91 F5.2 mag VTmag [5.14/10.63] Tycho VT-band magnitude
93- 96 F4.2 mag e_VTmag [0.01/0.06] Tycho VT error
98-102 F5.2 mag BTmag [5.63/11.62] Tycho BT-band magnitude
104-107 F4.2 mag e_BTmag [0.01/0.06] Tycho BT error
109-112 F4.2 mag Jmag [3.55/8.79] 2MASS J-band magnitude
114-117 F4.2 mag e_Jmag [0.02/8.89] 2MASS J error
119-122 F4.2 mag Hmag [3.33/8.35] 2MASS H-band magnitude
124-127 F4.2 mag e_Hmag [0.02/0.3] 2MASS H error
129-132 F4.2 mag Ksmag [3.04/8.25] 2MASS Ks-band magnitude
134-137 F4.2 mag e_Ksmag [0.02/9.99] 2MASS Ks error
139-143 F5.3 mag W1mag [3.44/8.159]? WISE W1-band magnitude
145-148 F4.2 mag e_W1mag [0.02/0.3]? WISE W1 error
150-153 F4.2 mag W2mag [2.74/8.24]? WISE W2-band magnitude
155-158 F4.2 mag e_W2mag [0.01/0.21]? WISE W2 error
160-164 F5.2 mas plx [1.23/67.02] Gaia eDR3 Parallax
166-170 F5.3 mas e_plx [0.013/0.701] Gaia eDR3 Parallax error
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Object ID
15- 18 I4 K Teff [4714/6662] Effective Temperature
20- 22 I3 K E_Teff [11/113] Upper (+1 Sigma) uncertainty in Teff
24- 26 I3 K e_Teff [13/124] Upper (-1 Sigma) uncertainty in Teff
28- 31 F4.2 [cm/s2] logg [2.18/4.61] log, Surface Gravity
33- 36 F4.2 [cm/s2] e_logg [0.01/0.25] Uncertainty in logg
38- 43 F6.3 --- [Fe/H] [-1.09/0.47] Abundance (1)
45- 48 F4.2 --- e_[Fe/H] [0.03/0.14] Uncertainty in [Fe/H]
50- 53 F4.2 km/s Vt [0.1/1.99] Microturbulence velocity (2)
55- 59 F5.2 --- [P/Fe] [-0.18/0.66] Abundance (3)
61- 64 F4.2 --- e_[P/Fe] [0.03/0.34] Uncertainty in [P/Fe]
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Note (1): A solar Fe abundance of A(Fe,Sun)=7.5 was adopted from
Asplund+, 2009ARA&A..47..481A 2009ARA&A..47..481A.
Note (2): The microturbulence velocity uncertainties are discussed in
Section 3.2 of the article.
Note (3): A solar P abundance of A(P,Sun)=5.43 is from this work; Section 3.4
of the article.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Object ID
15- 20 F6.1 km/s U [-158/237] Galactocentric U velocity component (1)
22- 24 F3.1 km/s e_U [0.1/8] U error
26- 31 F6.1 km/s V [-267/33] Galactocentric V velocity component (1)
33- 36 F4.1 km/s e_V [0.1/13] V error
38- 42 F5.1 km/s W [-94.5/103] Galactocentric W velocity component (1)
44- 47 F4.1 km/s e_W [0.1/18] W error
49- 52 F4.2 --- Pthin [0/1] Thin disk membership probability
54- 57 F4.2 --- Pthick [0/1] Thick disk membership probability
59- 62 F4.2 --- Phalo [0/1] Halo membership probability
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Note (1): Corrected to the local standard of rest
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 26-Oct-2022