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Nucleosynthesis in Baryon-rich Outflows Associated with Gamma-ray Bursts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Inoue, Susumu Iwamoto, Norihiko Orito, Matsuo Terasawa, Mariko |
| Copyright Year | 2003 |
| Abstract | Robust generation of gamma-ray bursts (GRBs) implies the fo rmation of outflows with very low baryon loads and highly relativistic velocities, but more baryon-rich, slower outflows are also likely to occur in most GRB central engine scenarios, either as “circum-jet winds” or “fai led GRBs”. Here we study the possibility of nucleosynthesis within such baryon-rich outflows by conducting detai l d reaction network calculations in the framework of the basic fireball model. It is shown that high baryon load fire balls attaining mildly relativistic velocities can synthesize appreciable quantities of heavy neutron capture el ements with masses up to the platinum peak and beyond. Small but interesting amounts of light elements such as deut erium and boron can also be produced. Depending on the neutron excess, the combination of high entropy, rapid i nitial expansion and gradual expansion at later times can cause the reaction flow to reach the fission regime, and its path can be intermediate between those of the rand s-processes (“ n-process”). The nucleosynthetic signature of these outflow s may be observable in the companion stars of black hole binary systems and in the most metal-poor stars, potentially offering an important probe of the inner conditions of the GRB source. Contribution to the sola r abundances for some heavy elements may also be possible. The prospects for further developments in variou s directions are discussed. Subject headings: nuclear reactions, nucleosynthesis, abundances — gamma ra ys: bursts — stars: abundances |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/astro-ph/0301392v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Adverse reaction to drug Behavior Black Hole Boron Erium GZMB wt Allele Gamma correction Interferon Type II Medical Subject Headings Neutrons Observable Offset binary Platinum Quantity Rand index Singlet fission Starflight Stars, Celestial |
| Content Type | Text |
| Resource Type | Article |
