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Placco, V.M., Almeida-Fernandes, F., Holmbeck, E.M., Roederer, I.U., Mardini, M.K., Hayes, C.R., et al. (2023) SPLUS J142445.34-254247.1: An r-Process-Enhanced, Actinide-Boost, Extremely Metal-Poor Star Observed with Ghost. The Astrophysical Journal, 959, Article No. 60.
https://doi.org/10.3847/1538-4357/ad077e

has been cited by the following article:

• TITLE: The Early R-Process Nucleosynthesis Scenarios

  AUTHORS: Noam Soker

  KEYWORDS: Galaxy Abundances, Explosive Nucleosynthesis, R-Process, Common Envelope Binary Stars, Neutron Stars, Stellar Jets

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.16 No.2, May 29, 2026

  ABSTRACT: I compare seven actively studied r-process nucleosynthesis scenarios against observed properties of r-process elements in the early Universe, and conclude that the most likely scenario to contribute to the site of elements below the third r-process peak is the magnetorotational r-process scenario, and that of the third peak is the common envelope jets supernova (CEJSN) r-process scenario. The collapsar and CEJSN r-process scenario might also contribute to the lighter r-process elements, and the binary neutron star (NS-NS) merger r-process scenario might contribute to the third r-process peak. The magnetar, the wind from the newly born NS, and the accretion-induced collapse of a white dwarf r-process scenarios fall short in explaining observations. They might exist, but cannot be major contributors to the r-process in the early Universe. To constrain r-process scenarios in the early Universe, I require that they explain the large scatter in the r-process abundances of very metal-poor stars, account for the correlation between light r-process nucleosynthesis and iron production, and the lack of correlation between the third peak r-process production and iron production, as inferred from very metal-poor stars. I discuss the diversity of the CEJSN r-process scenario and encourage extending its exploration.