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Metal-poor stars observed with the Magellan Telescope. IV. Neutron-capture element signatures in 27 main-sequence stars
Mohammad K. Mardini, Anna Frebel, Leyatt Betre +3
Based on high-resolution spectra obtained with Magellan/MIKE, we present a chemo-dynamical analysis for 27 near main-sequence turnoff metal-poor stars, including 20 stars analyzed…
Detailed chemical abundances of stars in the outskirts of the Tucana II ultra-faint dwarf galaxy
Anirudh Chiti, Anna Frebel, Alexander P. Ji +6
We present chemical abundances and velocities of five stars between 0.3 kpc to 1.1 kpc from the center of the Tucana II ultra-faint dwarf galaxy (UFD) from high-resolution Magellan…
Evidence of globular cluster abundance anomalies in the SMC intermediate-age cluster Kron 3
C. Salgado, G. S. Da Costa, D. Yong +5
Using spectra obtained with the VLT/FORS2 and Gemini-S/GMOS instruments we have investigated carbon, nitrogen and sodium abundances in a sample of red giants in the Small Magellani…
High resolution spectroscopic follow-up of the most metal-poor candidates from SkyMapper DR1.1
D. Yong, G. S. Da Costa, M. S. Bessell +13
We present chemical abundances for 21 elements (from Li to Eu) in 150 metal-poor Galactic stars spanning 4.1 [Fe/H] 2.1. The targets were selected from the SkyMapper…
An extended halo around an ancient dwarf galaxy
Anirudh Chiti, Anna Frebel, Joshua D. Simon +7
The Milky Way is surrounded by dozens of ultra-faint (< solar luminosities) dwarf satellite galaxies. They are the surviving remnants of the earliest galaxies, as confirmed…
Exploring the Galaxy's halo and very metal-weak thick disk with SkyMapper and Gaia DR2
G. Cordoni, G. S. Da Costa, D. Yong +16
In this work we combine spectroscopic information from the \textit{SkyMapper survey for Extremely Metal-Poor stars} and astrometry from Gaia DR2 to investigate the kinematics of a…