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SPLUS J142445.34–254247.1: An r-process–enhanced, Actinide-boost, Extremely Metal-poor Star Observed with GHOST

  • Authors: Vinicius M. Placco, Felipe Almeida-Fernandes, Erika M. Holmbeck, Ian U. Roederer, Mohammad K. Mardini, Christian R. Hayes, Kim Venn, Kristin Chiboucas, Emily Deibert, Roberto Gamen, Jeong-Eun Heo, Miji Jeong, Venu Kalari, Eder Martioli, Siyi Xu, Ruben Diaz, Manuel Gomez-Jimenez, David Henderson, Pablo Prado, Carlos Quiroz, Roque Ruiz-Carmona, Chris Simpson, Cristian Urrutia, Alan W. McConnachie, John Pazder, Gregory Burley, Michael Ireland, Fletcher Waller, Trystyn A. M. Berg, J. Gordon Robertson, Zachary Hartman, David O. Jones, Kathleen Labrie, Gabriel Perez, Susan Ridgway, Joanna Thomas-Osip

Vinicius M. Placco et al 2023 The Astrophysical Journal 959 .

  • Provider: AAS Journals

Caption: Figure 9.

Upper panel: heavy-element chemical abundance pattern of SPLUS J1424−2542, compared with the scaled solar system r-process (yellow) and the best-fit neutron star merger model (blue), normalized to match the observed Eu abundance. Also shown (gray lines) are random realizations of the neutron star merger; see text for details. Lower panel: residuals between the observations and scaled predictions. A ±0.2 dex shaded area is shown for reference.

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