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Alencastro Puls, A., Kuske, J., Hansen, C.J., Lombardo, L., Visentin, G., Arcones, A., et al. (2025) Chemical Evolution of r-Process Elements in Stars (CERES): IV. An Observational Run-Up of the Third r-Process Peak with Hf, Os, Ir, and Pt. Astronomy & Astrophysics, 693, A294.
https://doi.org/10.1051/0004-6361/202452537

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.