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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 5.

Ages determined from ﹩\mathrm{log}\epsilon ({\rm{Th}}/{\rm{X}})﹩ abundance ratios, using the PRs from H. Schatz et al. (2002) and the equations given in V. M. Placco et al. (2017). The uncertainties represent the uncertainties in the derived ﹩\mathrm{log}\epsilon ({\rm{Th}}/{\rm{X}})﹩ ratios and the PRs. The horizontal dashed and dotted lines show the average ages for J1521−0607 and J1459−3852, respectively. Both stars are consistent with old ages for the r-process material.

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