期刊
ASTROPHYSICAL JOURNAL
卷 753, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/753/1/69
关键词
gamma-ray burst: general; nuclear reactions, nucleosynthesis, abundances; supernovae: general
资金
- Center for Cosmology and Astro-Particle Physics (CCAPP) at The Ohio State University
- JSPS
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [19047004, 22244019, 22244030, 21684014]
- National Science Foundation [PHY-0757155]
- Direct For Mathematical & Physical Scien
- Division Of Physics [757155] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [21684014, 24103006, 22244030] Funding Source: KAKEN
Heavy nuclei such as nickel-56 are synthesized in a wide range of core-collapse supernovae (CCSN), including energetic supernovae associated with gamma-ray bursts (GRBs). Recent studies suggest that jet-like outflows are a common feature of CCSN. These outflows may entrain synthesized nuclei at launch or during propagation, and provide interesting multi-messenger signals including heavy ultra-high-energy cosmic rays. Here, we investigate the destruction processes of nuclei during crossing from the stellar material into the jet material via a cocoon, and during propagation after being successfully loaded into the jet. We find that nuclei can survive for a range of jet parameters because collisional cooling is faster than spallation. While canonical high-luminosity GRB jets may contain nuclei, magnetic-dominated models or low-luminosity jets with small bulk Lorentz factors are more favorable for having a significant heavy nuclei component.
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