91 citations · 693 across the 20 of their papers we have counts for
21 papers
Additional Evidence for the Existence of a Primordial Disk System
Shuai Xu, Haibo Yuan, Bowen Huang +7
The origin of very metal-poor (VMP; [Fe/H] ) stars on planar orbits has been the subject of great attention since their first discovery. However, prior to the release of…
Near-Infrared Spectroscopy with IGRINS-2 for Studying Multiple Stellar Populations in Globular Clusters
Dongwook Lim, Young-Wook Lee, Sol Yun +53
Recent advancements in near-infrared (NIR) spectroscopy have opened new opportunities for studying multiple stellar populations in globular clusters (GCs), particularly for newly d…
Connections between Planetary Populations and the Chemical Characteristics of their Host Stars
Sol Yun, Young Sun Lee, Young Kwang Kim +3
Chemical anomalies in planet-hosting stars (PHSs) are studied in order to assess how the planetary nature and multiplicity affect the atmospheric chemical abundances of their host…
A Dynamically Distinct Stellar Population in the Leading Arm of the Sagittarius Stream
Gwibong Kang, Young Sun Lee, Young Kwang Kim +1
We present a chemical and dynamical analysis of the leading arm (LA) and trailing arm (TA) of the Sagittarius (Sgr) stream, as well as for the Sgr dwarf galaxy core (SC), using red…
Search for Extremely Metal-Poor Stars with GEMINI-N/GRACES I. Chemical-Abundance Analysis
Miji Jeong, Young Sun Lee, Timothy C. Beers +5
We present stellar parameters and abundances of 13 elements for 18 very metal-poor (VMP; [Fe/H] -2.0) stars, selected as extremely metal-poor (EMP; [Fe/H] -3.0) candidates…
Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor () Regime
Guilherme Limberg, Anna B. A. Queiroz, Hélio D. Perottoni +6
In this work, we study the phase-space and chemical properties of Sagittarius (Sgr) stream, the tidal tails produced by the ongoing destruction of Sgr dwarf spheroidal (dSph) galax…
Chemodynamical Analysis of Metal-rich High-eccentricity Stars in the Milky Way's Disk
Ayeon Lee, Young Sun Lee, Young Kwang Kim +2
We present a chemodynamical analysis of 11,562 metal-rich, high-eccentricity halo-like main-sequence (MS) stars, which has been referred to as the Splash or Splashed Disk, selected…
Mining S-PLUS for Metal-Poor Stars in the Milky Way
Vinicius M. Placco, Felipe Almeida-Fernandes, Anke Arentsen +4
This work presents the medium-resolution () spectroscopic follow-up of 522 low-metallicity star candidates from the Southern Photometric Local Universe Survey (S-PLUS…
Carbon-Enhanced Metal-Poor star candidates from BP/RP Spectra in DR3
Madeline Lucey, Nariman Al Kharusi, Keith Hawkins +6
Carbon-enhanced metal-poor (CEMP) stars comprise almost a third of stars with [Fe/H] < --2, although their origins are still poorly understood. It is highly likely that one sub-cla…
On the inconsistency of [C/Fe] abundances and the fractions of carbon-enhanced metal-poor stars among various stellar surveys
Anke Arentsen, Vinicius M. Placco, Young Sun Lee +4
Carbon-enhanced metal-poor (CEMP) stars are a unique resource for Galactic archaeology because they probe the properties of the First Stars, early chemical evolution and binary int…
Determination of Sodium Abundance Ratio from Low-Resolution Stellar Spectra and Its Applications
Jae-Rim Koo, Young Sun Lee, Hye-Jin Park +2
We present a method to determine sodium-abundance ratios ([Na/Fe]) using the Na I D doublet lines in low-resolution ( 2000) stellar spectra. As stellar Na I D lines are ble…
Dynamically Tagged Groups of Metal-Poor Stars from the Best \& Brightest Survey
Derek Shank, Timothy C. Beers, Vinicius M. Placco +9
Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for metal-poor stars ([Fe/H] ) compiled from the Best B…
Beyond spectroscopy. I. Metallicities, distances, and age estimates for over twenty million stars from SMSS DR2 and Gaia EDR3
Yang Huang, Timothy C. Beers, Christian Wolf +8
Accurate determinations of stellar parameters and distances for large complete samples of stars are keys for conducting detailed studies of the formation and evolution of our Galax…
Bright Metal-Poor Stars from the Hamburg/ESO Survey. II. A Chemodynamical Analysis
Timothy C. Beers, Vinicius M. Placco, Daniela Carollo +6
We obtain estimates of stellar atmospheric parameters for a previously published sample of 1777 relatively bright (9 < B < 14) metal-poor candidates from the Hamburg/ESO Survey. Th…
The age structure of the Milky Way's halo
D. Carollo, T. C. Beers, V. M. Placco +7
We present a new, high-resolution chronographic (age) map of the Milky Way's halo, based on the inferred ages of ~130,000 field blue horizontal-branch (BHB) stars with photometry f…
Spectroscopic Survey of G and K Dwarfs in the Hipparcos Catalog. I. Comparison between the Hipparcos and Photometric Parallaxes
Bokyoung Kim, Deokkeun An, John R. Stauffer +3
The tension between the Hipparcos parallax of the Pleiades and other independent distance estimates continues even after the new reduction of the Hipparcos astrometric data and the…
The Fractions of Inner- and Outer-Halo Stars in the Local Volume
Deokkeun An, Timothy C. Beers, Rafael M. Santucci +4
We obtain a new determination of the metallicity distribution function (MDF) of stars within - kpc of the Sun, based on recently improved co-adds of photometry f…
Modelling the observed properties of carbon-enhanced metal-poor stars using binary population synthesis
C. Abate, O. R. Pols, R. J. Stancliffe +4
The stellar population in the Galactic halo is characterised by a large fraction of CEMP stars. Most CEMP stars are enriched in -elements (CEMP- stars), and some of these are…
Metal-Poor Stars Observed with the Magellan Telescope. III. New Extremely and Ultra Metal-Poor Stars from SDSS/SEGUE and Insights on the Formation of Ultra Metal-Poor Stars
Vinicius M. Placco, Anna Frebel, Young Sun Lee +5
We report the discovery of one extremely metal-poor (EMP; [Fe/H]<-3) and one ultra metal-poor (UMP; [Fe/H]<-4) star selected from the SDSS/SEGUE survey. These stars were identified…
The Frequency of Field Blue-Straggler Stars in the Thick Disk and Halo System of the Galaxy
Rafael M. Santucci, Vinicius M. Placco, Silvia Rossi +5
We present an analysis of a new, large sample of field blue-straggler stars (BSSs) in the thick disk and halo system of the Galaxy, based on stellar spectra obtained during the Slo…
Population Studies. XIII. A New Analysis of the Bidelman-MacConnell "Weak-Metal" Stars - Confirmation of Metal-Poor Stars in the Thick Disk of the Galaxy
Timothy C. Beers, John E. Norris, Vinicius M. Placco +4
A new set of very high signal-to-noise (S/N > 100/1), medium-resolution (R~3000) optical spectra have been obtained for 302 of the candidate "weak-metal" stars selected by Bidelman…