Stellar Loci VI: An Updated Catalog of the Best and Brightest Metal-poor Stars

Abstract

We employ Gaia, 2MASS, and ALLWISE photometry, as well as astrometric data from Gaia, to search for relatively bright very metal-poor ([Fe/H] $<-2.0$; VMP) giant star candidates using three different criteria: 1) our derived Gaia photometric metallicities, 2) the lack of stellar molecular absorption near 4.6 microns, and 3) their high tangential velocities. With different combinations of these criteria, we have identified six samples of candidates with $G<$ 15: the Gold sample (24,304 candidates), the Silver GW sample (40,157 candidates), the Silver GK sample (120,452 candidates), the Bronze G sample (291,690 candidates), the Bronze WK sample (68,526 candidates), and the Low $b$ sample (4,645 candidates). The Low $b$ sample applies to sources with low Galactic latitude, $|b|<10^{\circ }$, while the others are for sources with $|b|>10^{\circ }$. By cross-matching with results derived from medium-resolution ($R\sim$ 1800) from LAMOST DR8, we establish that the success rate for identifying VMP stars is 60.1$\%$ for the Gold sample, 39.2$\%$ for the Silver GW sample, 41.3$\%$ for the Silver GK sample, 15.4$\%$ for the Bronze G sample, 31.7$\%$ for the Bronze WK sample, and 16.6$\%$ for the Low $b$ sample, respectively. An additional strict cut on the quality parameter $RUWE<1.1$ can further increase the success rate of the Silver GW, Silver GK, and Bronze G samples to 46.9$\%$, 51.6$\%$, and 29.3$\%$, respectively. Our samples provide valuable targets for high-resolution follow-up spectroscopic observations, and are made publicly available.

arXiv comment15 pages, 9 figures, 4 tables, accepted for publication in ApJS, data is available at https://doi.org/10.12149/101160

References in corpus (53)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Gaia Early Data Release 3: The astrometric solution
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
• The First Data Release (DR1) of the LAMOST general survey
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• The GALAH+ Survey: Third Data Release
• LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan
• SkyMapper and the Southern Sky Survey
• The Stellar Abundances for Galactic Archeology (SAGA) Database - Compilation of the Characteristics of Known Extremely Metal-Poor Stars
• A single low-energy, iron-poor supernova as the source of metals in the star SMSS J 031300.36-670839.3
• Empirical extinction coefficients for the GALEX, SDSS, 2MASS and WISE passbands
• The first chemical enrichment in the universe and the formation of hyper metal-poor stars
• The PASTEL catalogue of stellar parameters
• J-PLUS: The Javalambre Photometric Local Universe Survey
• The PASTEL catalogue: 2016 version
• Gaia Early Data Release 3: Summary of the contents and survey properties
• The GALAH Survey: Observational Overview and Gaia DR1 companion
• The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies and redshifts with 12 optical filters
• The stellar content of the Hamburg/ESO survey. IV. Selection of candidate metal-poor stars
• Three-dimensional interstellar dust reddening maps of the Galactic plane
• The Blue Tip of the Stellar Locus: Measuring Reddening with the SDSS
• Are C-rich ultra iron poor stars also He-rich?
• Four-hundred Very Metal-Poor Stars Studied with LAMOST and Subaru. II. Elemental abundances
• The Stellar Abundances for Galactic Archaeology (SAGA) Database II - Implications for Mixing and Nucleosynthesis in Extremely Metal-Poor Stars and Chemical Enrichment of the Galaxy
• The Best and Brightest Metal-Poor Stars
• Stellar Abundances for Galactic Archaeology Database IV - Compilation of Stars in Dwarf Galaxies
• The oldest and most metal poor stars in the APOSTLE Local Group simulations
• The Stellar Abundances for Galactic Archaeology (SAGA) Database III - Analysis of Enrichment Histories for Elements and Two Modes of Star Formation during the Early Evolution of Milky Way
• Spectroscopic analysis of metal-poor stars from LAMOST: early results
• The Pristine Survey -- VI. The first three years of medium-resolution follow-up spectroscopy of Pristine EMP star candidates
• J-PLUS: Identification of low-metallicity stars with artificial neural networks using SPHINX
• Beyond spectroscopy. I. Metallicities, distances, and age estimates for over twenty million stars from SMSS DR2 and Gaia EDR3
• High-resolution spectroscopic studies of ultra metal-poor stars found in LAMOST survey
• Chemistry of the Most Metal-poor Stars in the Bulge and the z > 10 Universe
• The Photometric Metallicity and Carbon Distributions of the Milky Way's Halo and Solar Neighborhood from S-PLUS Observations of SDSS Stripe 82
• The value-added catalogue for LAMOST DR8 low-resolution spectra
• A Blueprint for the Milky Way's Stellar Populations: The Power of Large Photometric and Astrometric Surveys
• Selecting M-giants with infra-red photometry: Distances, metallicities and the Sagittarius stream
• Metal-poor stars observed with the automated planet finder telescope. I. Discovery of five carbon-enhanced metal-poor stars from LAMOST
• J-PLUS: Stellar Parameters, C, N, Mg, Ca and [α/Fe] Abundances for Two Million Stars from DR1
• The RAVE Survey: Rich in Very Metal-Poor Stars
• Stellar Loci V: Photometric Metallicities of 27 Million FGK Stars based on Gaia Early Data Release 3
• Correction to the photometric colors of Gaia Early Data Release 3
• Targeting Bright Metal-poor Stars in the Disk and Halo Systems of the Galaxy
• Stellar loci III: Photometric metallicities for half million FGK stars of Stripe 82
• Correction to the photometric magnitudes of the Gaia Early Data Release 3
• New ultra metal-poor stars from SDSS: follow-up GTC medium-resolution spectroscopy
• Validations and Corrections of the SFD and Planck Reddening Maps Based on LAMOST and Gaia Data

Cited by in corpus (2)

• The Pristine survey -- XXIII. Data Release 1 and an all-sky metallicity catalogue based on Gaia DR3 BP/RP spectro-photometry
• The S-PLUS Ultra-Short Survey: first data release