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10 papers · 2 filters
The R-Process Alliance: Chemo-Dynamically Tagged Groups of Halo -Process-Enhanced Stars Reveal a Shared Chemical-Evolution History
Dmitrii Gudin, Derek Shank, Timothy C. Beers +11
We derive dynamical parameters for a large sample of 446 -process-enhanced (RPE) metal-poor stars in the halo and disk systems of the Milky Way, based on data releases from the…
The role of faint population III supernovae in forming CEMP stars in ultra-faint dwarf galaxies
Myoungwon Jeon, Volker Bromm, Gurtina Besla +2
CEMP-no stars, a subset of carbon enhanced metal poor (CEMP) stars ( and ) have been discovered in ultra-faint dwarf (UFD) galaxies, with $…
Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Re-calibration of SMSS DR2
Yang Huang, Haibo Yuan, Chengyuan Li +13
We apply the spectroscopy-based stellar-color regression (SCR) method to perform an accurate photometric re-calibration of the second data release from the SkyMapper Southern Surve…
Cosmological Insights into the Early Accretion of \textit{r}-Process-Enhanced stars. I. A Comprehensive Chemo-dynamical Analysis of LAMOST J1109+0754
Mohammad K. Mardini, Vinicius M. Placco, Yohai Meiron +10
This study presents a comprehensive chemo-dynamical analysis of LAMOST J1109+0754, a bright (V = 12.8), extremely metal-poor (\abund{Fe}{H} = ) star, with a strong \textit{r…
External Enrichment of Minihalos by the First Supernovae
William Hicks, Azton Wells, Michael L. Norman +3
Recent high-resolution simulations of early structure formation have shown that externally enriched halos may form some of the first metal enriched stars. This study utilizes a 1 c…
The Formation of Very Massive Stars in Early Galaxies and Implications for Intermediate Mass Black Holes
John A. Regan, John H. Wise, Tyrone E. Woods +3
We investigate the ab-initio formation of super-massive stars in a pristine atomic cooling halo. The halo is extracted from a larger self-consistent parent simulation. The halo rem…