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The R-Process Alliance: The r-process Enhancement of Stars from Chemodynamically Tagged Groups in the Milky Way Halo

  • Authors: Jessica Merritt Agnos, Charli M. Sakari, Pedro Silva, Terese T. Hansen, Erika M. Holmbeck, Ian U. Roederer, Hal France, Truman Farr, Rana Ezzeddine, Anna Frebel, Vinicius M. Placco, Timothy C. Beers

Jessica Merritt Agnos et al 2026 The Astrophysical Journal 1004 .

  • Provider: AAS Journals

Caption: Figure 4.

Abundance patterns of the three target stars with respect to (wrt) to various benchmark patterns for the light r-process elements (Z ≤ 47; left) and the heavy r-process elements (Z ≥ 56; right). The light r-process patterns are scaled to the same Zr abundance, while the heavy r-process patterns are scaled to the same La abundance. The top panels show the full r-process abundance patterns of the three target stars compared to the solar s- and r-process patterns from C. Arlandini et al. (1999), while the middle panel shows the residual offsets from the solar r-process pattern. The bottom panel shows the offsets relative to the metal-poor star benchmark pattern from I. U. Roederer et al. (2023). The uncertainties in ﹩{\rm{\Delta }}\mathrm{log}\epsilon ({\rm{X}})﹩ reflect uncertainties from this paper and the benchmark values, added in quadrature.

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