Sam A. Usman

activity

20242026

most cited

S^{5}

: New insights from deep spectroscopic observations of the tidal tails of the globular clusters NGC 1261 and NGC 1904

11 citations · 23 across the 9 of their papers we have counts for

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astro-ph.SR2026

AGB-star Mass Transfer Products in Stellar Streams as Tracers of Density in Dissolved Star Clusters

Newlin C. Weatherford, Madeleine McKenzie, Sam A. Usman

The least dense globular clusters (GCs) appear to host the highest fractions of stars with chemical signatures of mass transfer from asymptotic giant branch (AGB) companions. Recen…

astro-ph.SR2026

The $R$ -Process Alliance: Actinide Abundances, Variation, and Evolution in Metal-Poor Stars

Shivani P. Shah, Rana Ezzeddine, Erika M. Holmbeck +11

The actinides, including thorium (Th), are the heaviest observable elements synthesized in the universe, holding clues to the extremes of the astrophysical and nuclear conditions o…

AGB-star Mass Transfer Products in Stellar Streams as Tracers of Density in Dissolved Star Clusters

The R-Process Alliance: Actinide Abundances, Variation, and Evolution in Metal-Poor Stars

The $R$ -Process Alliance: Actinide Abundances, Variation, and Evolution in Metal-Poor Stars