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The Best and Brightest Metal-Poor Stars
Kevin C. Schlaufman, Andrew R. Casey
The chemical abundances of large samples of extremely metal-poor (EMP) stars can be used to investigate metal-free stellar populations, supernovae, and nucleosynthesis as well as t…
NGC 6522: A typical globular cluster in the Galactic bulge without signatures of rapidly rotating Population III stars
Melissa Ness, Martin Asplund, Andrew R. Casey
We present an abundance analysis of eight potential member stars of the old Galactic bulge globular cluster NGC6522. The same stars have previously been studied by Chiappini et al.…
A Tale of Tidal Tails in the Milky Way
Andrew R. Casey
Hundreds of globular clusters and dwarf galaxies encircle the Milky Way. Many of these systems have undergone partial disruption due to tidal forces, littering the halo with stella…
A single low-energy, iron-poor supernova as the source of metals in the star SMSS J 031300.36-670839.3
S. C. Keller, M. S. Bessell, A. Frebel +11
The element abundance ratios of four low-mass stars with extremely low metallicities indicate that the gas out of which the stars formed was enriched in each case by at most a few,…