Nuclear Composition of Gamma-Ray Burst Fireballs
| dc.creator | Beloborodov, Andrei M. | |
| dc.date | 2002-10-23 | |
| dc.date | 2003-01-16 | |
| dc.date.accessioned | 2026-07-07T11:28:59Z | |
| dc.date.available | 2026-07-07T11:28:59Z | |
| dc.description | We study three processes that shape the nuclear composition of GRB fireballs: (1) neutronization in the central engine, (2) nucleosynthesis in the fireball as it expands and cools, and (3) spallation of nuclei in subsequent internal shocks. The fireballs are found to have a neutron excess and a marginally successful nucleosynthesis. They are composed of free nucleons, alpha-particles, and deuterium. A robust result is the survival of a significant neutron component, which has important implications. First, as shown in previous works, neutrons can lead to observable multi-GeV neutrino emission. Second, as we show in an accompanying paper, neutrons impact the explosion dynamics at radii up to 10^{17} cm and change the mechanism of the GRB afterglow emission. | |
| dc.description | 33 pages, accepted to ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0210522 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0210522 | |
| dc.identifier | Astrophys.J.588:931-944,2003 | |
| dc.identifier | doi:10.1086/374217 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196575 | |
| dc.subject | Astrophysics | |
| dc.title | Nuclear Composition of Gamma-Ray Burst Fireballs | |
| dc.type | text |