1. Possibility of Secondary i- and s-processes Following r-process in the Collapsar Jet
- Author
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Zhenyu He, Toshitaka Kajino, Motohiko Kusakabe, Shan-Gui Zhou, Hiroyuki Koura, Satoshi Chiba, Haining Li, and Yangming Lin
- Subjects
Explosive nucleosynthesis ,R-process ,S-process ,CEMP stars ,Solar abundances ,Astrophysics ,QB460-466 - Abstract
The slow and intermediate neutron-capture processes, s - and i -processes, are believed to occur in asymptotic giant branch stars to provide half of the heavy atomic nuclei with A ≥ 90. We suggest a possibility that certain types of outflows found in the collapsar, which is a supernova generated by a rapidly rotating massive star undergoing core collapse, leaving behind a black hole and emitting relativistic jets, can provide conditions that are viable for s - and i -processes as secondary processes following the rapid neutron-capture process, r -process. We propose that the pronounced odd–even effect in the mass abundance pattern near rare earth elements in metal-deficient halo stars could be an observational hint for the s - and i -processes in the collapsar.
- Published
- 2024
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